I've only spent a brief few hours with Obsidian's RPG/fish-person-friend simulator Avowed so far, but I'm enjoying my time with it.
What I haven't been enjoying is the occasional frame rate dip, along with a general twitchiness our Nick highlighted in his performance analysis.
However, it turns out there's actually a simple tweak that enables FSR 3 frame generation, and it's more than doubled my frame rate—but it does come with one major caveat.
A quick bit of late night searching resulted in this post from Reddit user Hawkiinz, in which they reveal an easy way to enable FSR 3 frame generation with a simple engine.ini tweak.
Navigate to the file in your Windows user folder, open it in Notepad, add a new entry and save, and ta-da, many more frames with FSR enabled.