Well I’m using a basic 4 port 1gig Netgear and there’s really no port designated at the uplink port. But I do have the ONT plugged into port 1.
If you plan doing switch in the middle bypass, then just get a basic 1gig switch and only use for the bypass. For me I have another Ruckus switch that handles my LAN and I only use the Netgear for the bypass.