Macbook Pro 16" 2019 overheats and drains battery even when closed

I don't see any of the usual software culprits that would produce that issue, although the report does mention:

Unsigned Files:

Running app: (launcher)

I've never seen that listed on any of the other reports posted on this forum. That could possibly be the problem, but I have no idea what it is or what app it may be associated. Try booting into Safe Mode to see if that makes any difference. If it works, then this item may be the problem, but I'm not sure if it will be easy to locate.

You can also try running Disk Utility First Aid on the hidden Container. Within Disk Utility you may need to click "View" and select "Show All Devices" before the hidden Container appears on the left pane of Disk Utility. Even if First Aid says everything is "Ok", click "Show Details" and scroll back through the report to see if any unfixed errors are listed. If so, then try running First Aid again to see if they disappear. If not, then try running First Aid while booted into Recovery Mode, otherwise you will need to erase the whole physical internal SSD (Intel Macs only) followed by reinstalling macOS & restoring from a backup.

You can try running the Apple Diagnostics to see if any hardware issues are detected.

You can try an SMC Reset (read the instructions carefully since the procedure has changed for your T2 Mac) and a PRAM Reset (try holding the PRAM Reset for two chimes if possible, but sometimes it won't allow you).

Also, disconnect all external devices in case one of them is causing a problem.

If First Aid does not detect any file system issues, then you could try creating a new APFS volume & installing macOS onto the new APFS volume to see how it behaves. Just make sure to test the clean OS as is. This is not as good a test as a full clean install (first erasing the SSD before reinstalling macOS), but it may provide insight if it works properly. Just don't install any third party apps, do not restore from backup, and do not sign into your AppleID or iCloud.

this pane is troubling:

Top Processes Snapshot by Energy Use:

Process (count) Energy (0-100) (Source - Location)

WindowServer 3 (Apple)

Google Chrome Helper (Renderer) (37) 3 (Google LLC)

sysmond 0 (Apple)

mDNSResponder 0 (Apple)

Activity Monitor 0 (Apple)

that says that more than a third (37 out of 100) of the Energy used by your Mac is being consumed by Google Chrome and its minions such as google chrome helper.

Google chrome is THE most resource hungry application you can run on your Mac that is not obvious malware. When not actively in use, you should quit google chrome completely, Not just close all its open windows. if you can switch to ANY other browser you will be much better off. safari or Firefox are much better choices, and Brave browser has been suggested as chrome-like without the incredibly resource intensive footprint.

this one is also troubling:

Top Processes Snapshot by CPU:

Process (count) CPU (Source - Location)

mdbulkimport (2) 21.06 % (Apple)

EtreCheckPro 15.42 % (Etresoft, Inc.)

WindowServer 7.66 % (Apple)

sysmond 3.84 % (Apple)

trustd (4) 3.08 % (Apple)

mdworker and mds are the spotlight indexing daemons. Spotlight is used to create a permuted index of every word in every document, to make searches really fast.

The spotlight index is also related to Time machine backups. I do not see your time machine drive information (requires additional authorizations so that it can be shown). If your Time machine drive is too small, Time machine may spend DAYS after a major upgrade trying to reduce the sizes of old backups to make room for a new full backup.

I missed "launcher" as an unsigned item on first reading. Launcher was used as the name of a system item in much older MacOS.

Unsigned items have no place on your otherwise well-protected Macintosh computer. Each and every legitimate installed item should be signed with the certificate of a Registered Developer, to indicate that it IS legitimate software.

that launcher could be related to an older version of this:

User Login Items:

  [Not Loaded] FriendlyStreamingLauncher (App Store - installed 2024-03-21)

    Modern Login Item

  /Applications/Friendly Streaming.app/Contents/Library/LoginItems/FriendlyStreamingLauncher.app

if that is the source, you should either REMOVE that software, or update to the latest version, which should not include anything not Signed.

Run the third party app EtreCheck and post the complete report here so we can examine it for clues.

One other really wonky thing one user recently discovered. They had accidentally authorized Voice Commands, and their Mac was using HUGE amounts of compute power trying to listen to them and interpret what they were telling it to do.

Also, when you close the cover, it REQUESTs that your Mac go to sleep. You can NOT assume your Mac is actually sleeping. It could remain awake and fully functional with the cover closed.

if you suspect this, leave the display open and choose Sleep off the Apple menu, and observe whether it does, in fact, go to sleep. if not, there are steps that can be used to analyze why not.

Fan is running and very slow response when on Teams meetings - unable to type in O365 apps..