okay so question here and im sorry if its a lot but,

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b450 -

https://www.amazon.com/ASUS-Prime-II-Motherboard-Flashback/dp/B08KH12V25/ref=sr_1_1?keywords=b450%2Bmotherboard&qid=1648871267&sprefix=b450%2Caps%2C157&sr=8-1&th=1

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b550 -

https://www.amazon.com/GIGABYTE-B550-AORUS-Realtek-Motherboard/dp/B089FT8G44/ref=sr_1_2?crid=3PVOB09TEO2UX&keywords=b550+motherboard&qid=1648871274&sprefix=b550+%2Caps%2C167&sr=8-2

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either one of these will work for me? but i would need either retailer to update bios or would bios flashing work ?