How to get the Bioscanner in Subnautica 2
via pcgamer.com
Short excerpt below. Read at the original source.
The Bioscanner is a very important late-game upgrade to your trusty Scanner in Subnautica 2, since it lets you scan marine life to unlock additional Biomods. I recommend you grab it as soon as you can, as unfortunately the scans aren’t retroactive. You’ll have to find and scan any creatures you might have already catalogued. […]