Launch the Console app and search for the Kernel Panic logs by checking inside the folders on the left pane of the Console app for folder names something like "System Reports", "Diagnostic Reports", "/private/var/log", or "/var/log", etc. When you click on a folder on the left pane it will open up a new pane immediately to the right with files which are contained within the folder. Apple has changed the names and locations of the folders over the years and I don't recall all the various names exactly. The name of the Kernel Panic log file will begin with "kernel" and end in ".panic" with the date & time found in between them. Post several of the Kernel Panic reports here so see if there is any pattern to them. Post the complete reports here using the "Additional Text" icon which looks like a piece of paper.
Also run EtreCheck and post the report here using the "Additional Text" icon which looks like a piece of paper.
Run the Apple Diagnostics.