A beta bios has leaked for the Lenovo Legion Go on Reddit that comes with the following updates:
Change Charging Speed - You can now adjust the charge the battery charging rate when under heavy load in the bios
Slow Charging (default)
Medium
High (3A constant mode)
VRAM can now be to 6GB in bios
Hyperthreading can now be disabled
While this is not the official release notes and bios version we have been running this successfully and it also appears to have fixed the Custom TDP not setting correctly as well as brining performance improvements to Legion Space.
If you want to install the beta bios and tweak the other settings, you can check out our video guide below: