Acer Predator Helios 300 (PH315-51-78NP) I JUST NEED THE OPTION TO SWITCH between LEGACY AND UEFI

i have an older hdd from my aio i converted it from mbr to gpt in AOEMI backupper then cloned the 3.5 hdd to a SSD nvme

but the bios isnt showing it nor is it giving me boot options to select legacy please help need mod that will allow me to boot this from this laptop! i will pay!

That’s what one of the users reported.
Wanna try dual boot?