HelixSR got a brand new update that adds its own implementation of FSR 4 to make it more optimized for even more GPUs:
https://steamdeckhq.com/helixsr-adds-new-hlx-fsr-4-upscaler/?utm_source=dlvr.it&utm_medium=mastodon
Steam Deck HQHelixSR Adds New HLX FSR 4 Upscaler With 3.1 Update - Steam Deck HQHelixSR got a brand new update that adds its own implementation of FSR 4 to make it more optimized with a wider swath of GPUs.