Maybe the CMOS battery needs to be replaced?
After CMOS reset.
Hardware log: https://0x0.st/o6y5.txt
Boot Log: https://0x0.st/o6yR.txt
It could be the CMOS battery, but I remember having this issue in Manjaro. However, I was able to get it to post with the GPU without resetting the CMOS.
I know there are differences with Manjaro and EndeavourOS and I mainly switched due to some frustrations with the OS.