Few motherboards do these days. For the most part it’s reserved for ITX and high end boards. My Maximus X Formula has it, but I don’t use it.
I would strongly recommend wired Ethernet, but if you can’t, I used the Netgear AC1200 (A6210) and was very impressed. It’s a USB dongle rather than a PCI-E card though.
Something like this from OCUK would be good, there are higher end versions with external antennas available too :
https://www.overclockers.co.uk/asus...-pci-e-adapter-90ig00k0-bm0000-nw-088-as.html