Bootable drives can’t be seen, bootpicker doesn’t show it. And only shows the OCLP ver and not the normal apple bootpicker

First boot was fine. Showed the Mac boot picker but after attempting a reinstall on a external disk( internal drive is untouched) , the reinstaller booted back into the internal disk. After forcing it to pick the external installer as the main boot drive , it no longer shows the apple boot picker & just shows the OCLP boot picker

How do I get back to the original boot picker? Or remove this EFI? I do not need this EFI for the MacOS to run