I mean if you can bifurcate you can get cards that split full 16 lanes to 4 connectors
Honestly just wait for @aBav.Normie-Pleb 100% resident expert on these things
Lots of good lessons here
https://forum.level1techs.com/t/a-neverending-story-pcie-3-0-4-0-5-0-bifurcation-adapters-switches-hbas-cables-nvme-backplanes-risers-extensions-the-good-the-bad-the-ugly/