Tldr: no need to do anything.
BIOS firmware: it’s totally OS indipendent, so no need to do anything when you reinstall. amdgpu driver firmware: version shipped with 24.04 have the vp9 issue solved, so no need to upgrade it either.
Kernel: no custom kernel has been provided by framework, using default kernel 6.8 is fine. There are some patches from 6.9 and 6.10 that are related to AMD framework laptop but I’d advice you to use the default kernel (unless you are accustomed to building your own kernel).