This is more of a curiosity though one I had for some time. I have a modern motherboard as of the past years, it supports TMP 2.0. I know everyone’s been talking about how Windows 11 (a monstrosity I’m grateful I don’t need to touch) requires it and won’t even support machines without that.

For Linux in our case, I was curious if TMP has any use. Are there any system functions that make use of this system for added security? Does GRUB use it when booting by default, if the module is detected upon installing? Any kernel / systemd modules or other common processes?

While by default it doesn't use it, I've read some tutorials on using LUKS encryption with TPM. That's the only thing I personally have ever read about using TPM on Linux for.

I have seen some cases where with the bios supporting tpm the only way to disable secure boot was to also disable tpm. That is likely specific to what bios is in use.

I do not know if there is an actual use for tpm within linux as of yet.