Now as far as I know, Linux doesn't have any of that by default. Windows & Mac don't have this stuff at all, so let's forget about them.
Linux has support for biometrics and encryption depending on desktop environment you are using.
I know that if you run Fedora linux with Gnome de you can add biometric fingerprint and use to instead password or for login, in Fedora KDE you can use it only instead of password, so it works.
During installation of Linux you can enable disk encryption so anything stored in this drive could be considered secure, if strong password is used.
How can we securely erase the working data while AirGap Wallet is exiting? Remember that filesystems don't overwrite files in-place so merely writing random data won't work.
I don't know exactly how Airgap vault is working, and I never managed to read their technical documentation, if they have it.
All I found is some basic documentation page, with lot of pages dedicated to various shitcoins:
https://support.airgap.it/