As I understand it, the socket on the CPU changes every few years. Intel is on a socket called LGA1700 now which will support 14th gen but after that it will be a different socket. So any motherboard that has LGA1700 can be used for now but later new motherboards will be released for the new socket. Similarly in AMD, the current socket is AM5 which they've said they will support for another year or something, after that the new CPUs will be on a new socket.

The above matters for choosing a motherboard that will be supported later by new CPUs. For GPUs the socket doesn't matter, but the higher the PCIe I suppose that's better.

I'm a beginner at this though, and may be wrong, but you could search more along these lines. Hope this helps!