I think you're misunderstanding what we're saying
Many modern boards support both, with an internal firmware option and an external module
They only have two BIOS options Firmware, or external - and they default to external, disabling the firmware support.
I've checked all my AM4 boards here, and ALL of them behave this way by default, despite being from asus, giga, aorus, and MSI.
Win 11 can't identify that it's been switched to that 'external' setting and just says 'nah get fucked, no W11 for you' and the wording we've been using is from the windows 11 messages about unsupported, blahblah. I'm curious why my Ryzen 1000 is supposedly unsupported, when the same B450 board i have could run ryzen 1k 2k and 3k chips, with most of them on the official list