I would like to know if there is a BIOS update also. What diagnostic tool are you using to display the BIOS version? I am troubleshooting a problem with a blank screen display after closing and reopening the lid. I want to try updating the BIOS to see if that will fix the problem.
The Pocket 3 support page has a download for Pocket 3 (N6000) version BIOS Firmware v1.15. I have no idea if that would work on the P2 Max 2022. I sent an email request about a BIOS upgrade to Pocket support and will report here if I receive a reply. Other than the blank screen problem after reopening the lid, my P2 Max 2022 works great. I have a dual boot setup with Windows 11 and Xubuntu 22.10.
GPD Support sent an email link to P3_P3MAX(N6000)_Drivers_V1.3 to update the drivers and BIOS. After I installed the package, the BIOS is still version 2.02, 11/26/2021. I do not think this package will update the BIOS. After I updated the Graphics Driver using the Intel Driver & Support Assistant, the display recovers after opening the lid.
I did find their official Softwin website, which is in Mandarin. GPD P2 Max 2022 固件下载-深圳市中软赢科技术有限公司 (softwincn.com)
There is no link to any firmware/BIOS downloads. I can only assume there has been no update.
They only have “ghost” systems (basiclly pre-install/bundled Windows images). I assume they contain nothing useful. If you want, you can download those – they are 10GB zip files, so I won’t download that and make a mess on my laptop.