Anyone got DLSS Frame Generation to work on Alan Wake 2?

I can use DLSS Upscaling just fine, but Frame Generation is greyed out.

I tried a variety of up-to-date runners (proton GE, kron4ek etc.), even swapped out the DLSS and DLSS FG DLLs in the game dir, tried various environment variables, but nothing seems to work, FG option is greyed out.

Anyone got this working?