"Soon" being May 3, 2023 at the moment. I've lost count how many times the requirement for Real ID to fly has been delayed.

So far, searches haven't turned up authoritative information (on a current, relevant federal or state sites) on Real ID requiring any biometrics. I believe it, I just haven't found an official source confirming it.

I got a REAL ID several months ago and definitely didn't get fingerprinted in the process.