There are plenty of OCuLink eGPU enclosures available. There are also bare adapter boards if you want to build your own enclosure.
Since it’s just PCIe with a different connector, it’s much cheaper and simpler than Thunderbolt/USB4. It does have a couple of downsides though. It can’t be hot plugged, so the computer has to be shut down to connect or disconnect an OCuLink device and the connector is not designed for a large number of mating cycles.
Some MediaTek WiFi cards are not supported. I had to replace one in a laptop.