Lots of laptop vendors do. Very few integrate fingerprint scanners into any kind of secure authentication flow, though. There are decent fingerprint drivers for various brands, but connecting fingerprints to authentication beyond basic login requires manual setup.

You don't actually need biometrics to use key material, that's what (f)TPMs are for. They're not set up to be usable out of the box in any Linux distro I've tried, though.

It needs to come stock on every Linux laptop from now going forward period. Like you expect a screen to come with your machine. Every Mac has one now and I'm not going back to typing my password in every single time.