It's been a bit since I last did a PC build, but I can't think of any reason a PSU and Graphic's Card wouldn't work with what you already have. As far as I'm aware architecture hasn't changed or anything.
Only thing I can think of possibly is that the processor might wind up being a bottleneck on the overall performance, but they haven't changed a ton in the last 4 years so I don't think it would be a huge dealbreaker.
Ahhhh, the old Windows 11 won't run thing. Yeah. They tightened up requirements in it, and it's really goddamned annoying, performance wise I would bet you'd be fine, but they aren't on the list of 'approved hardware' that now exists somewhere in the Windows ether.
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Deeply annoying.