That 95%+ tells me that you have no junk loading in the background, so the issue definitely is not there.
The Google Chrome browser is great for so many things, but it absolutely will use significantly more CPU and especially RAM than using Safari, especially if you have a lot of Chrome windows and tabs open at once (often it will be using 500MB of ram per tab). If your Chrome usage is pretty light (like 6 tabs or less), and you installed the latest version (not an older version imported via Time Machine) then Chrome probably isn't the issue.
As I said, Microsoft Teams is pretty well known for being a huge performance killer. Most people usually do notice a very big difference in disabling the GPU hardware acceleration though. There is a big thread on this on Microsoft's community forum site:
https://techcommunity.microsoft.com/t5/microsoft-teams/why-teams-is-slowing-down-my-mac/m-p/1334064
In addition to checking the CPU in Activity Monitor, you should also check out the memory usage. Lightroom is also a pretty famous resource user, especially if you have a huge library. And Zoom can also be a bit piggy as well. iMovie aside, Teams, Chrome, and Lightroom (in that order) are literally the 3 most common resource hungry apps you can run on a Mac. If you check the Memory tab in Activity Monitor ideally you should be running with a good 3 to 4GB of free physical RAM (i.e. the difference between memory used, and physical memory ideally should show several gigabytes free.
All that being said (keeping your Chrome tab usage under a half dozen, turning of GPU acceleration in Teams, and being mindful these individually...let alone in combination...are the three hungriest apps) you probably should just go ahead and purchase an external active CPU cooler stand as that will make a dramatic difference. Obviously the apps you run are the apps you need to run, and short of discovering you maybe needed to have purchased a Mac with more RAM (if you only have an 8GB model, for example) there isn't too much more that can be done short of the better cooling. It will make a huge difference.
A good laptop cooling stand with a metal surface will help a lot and costs between $30-$60, although you may or may not be able to use your existing Twelve South High-rise with it. Getting one with adjustable speed and a temperature readout is also a good idea.
Keeping your MacBook Pro cool (externally) will increase the battery lifespan, reduce stress on the CPU and internal fan, and other components, and reduce the noise from the built-in fan from your particularly demanding apps. Based on your particular apps usage though (and not knowing the RAM situation) most likely there isn't a serviceable problem with the built-in fan or heatsink that could be "repaired" and an external cooling stand will be able to do more cooling at a lower/quieter RPM than the built-in fan. This will also give you better performance as the thermal throttling won't have to kick in nearly as much due to the high temperature.
I do think that this is a great example why the new M1 chips are a much bitter fit for Apple's design mentality in trying to keep things really thin physically in terms of power users needing the more demanding CPU apps.
