Here is the official changelog for the ROG Ally update on October 12th 2023 that includes BIOS 330.
Go to the MyASUS app to download the latest BIOS for the ROG Ally.
ROG Ally Update Changelog
According to the previous changelog this is what’s included in the latest BIOS update. I will update this if a new changelog is posted.
BIOS 330
- Enhancement: optimized overall system stability.