How do I go about reporting a regression from updating my flake.lock?

I'm on unstable and updated my flake.lock and 2 of my Steam games stopped working: Tiny Tina's Wonderlands and Elden Ring. Rolled back to my previous generation and they work again.

Is there a way to roll through nixpkgs commits to find the breaking commit? How do I gather the logs they will need and where should I report it to?