finding an external Network interface device compatible with Monterey OS

I have an older (circa 2015) MacBook that will no longer connect to the network connection point in my home. I live in a community with internet provided via a network with a host of access points, and I am able to access the network just about everywhere else on campus other than my house. Our network administrator (a pretty sharp guy) tells me its a problem with older MACs getting confused when confronted with a cluster of access points, which pretty well describes my home location. His solution was to get an external NIC, but I can't find one compatible with the Monterey OS. I stream TV from my home, can connect to the network with other computers from my home, so I am beginning to believe our network guy when he tells me its not the access point in my house. Anyone know of a Monterey compatible external network device?