

Hmmm.
Under LMDE7, the HP Spectre does great with the games I’ve thrown at it so far (BeamNG.Drive, Hollow Knight, Factorio, Universe Simulator, Minecraft, etc), but despite exceeding the minimum specs, it really struggled with running anything in RPCS3. Stuttering, frame drops, graphics simply not loading, etc… I ended up writing off RPCS3 in general as “too heavy for a laptop” and tasked my desktop gaming PC as the dedicated PS3 emulator - works great.
Sounds like I might have to give Bazzite a shot again on the HP. I use that laptop for a lot of things, including diagnostics software for my cars, but I also have a perfectly-capable AMD Thinkpad T14 G1 hanging around that needs a purpose, too.
It was Space Engineers 2. Even made a post about the journey.
What was the actual issue you ran into though? I didn’t see it in your post. I believe you, but my curiosity is piqued.

Aegis Authenticator hits every one of your points. I know because I have the same requirements for a TOTP application.
I also use KeePass for all of my passwords. KeePass can do TOTP, but I prefer that to remain separate.