It can, but it requires creating your own signing key, registering it with secure boot, and signing your nvidia driver.

There’s a guide here: https://askubuntu.com/a/1049479

But if you’re running any out of tree drivers (e.g. the nvidia driver), I’d recommend just leaving secure boot off.

I wonder if this made it into the android kernel: https://www.androidpolice.com/pixel-stutter-bug-addressed-by-third-party-dev/

Or if it is just general updates.

You have to be on the March update, then go to Developer options -> Linux environment, and enable it. Then ‘Terminal’ will appear in your apps drawer.