It is not surprising that the AppImage itself isn't modified.

Did you check the folder /home/<user>/.config/@trezor/suite-desktop/ as mentioned in the notes from trezor regarding the trezor suite?

If no files are stored there, you might also just run your software and then check in your home folder for recent file system changes with the following command:

This command will find files inside the home folder which change within the last minute.