I’m not sure, you basically have to do the homework for consumer hardware: one issue you’ll run into is that consumer routers often depend on binary blobs and propriety drivers for WiFi functionality like MIMO. Netgear’s firmwares are based on OpenWRT, though, and nearly every netgear device I’ve owned has had some way to get shell access (my current device is a netgear Orbi (RBR40)). It has shell access and tcpdump is included in the base image.