Truenas-HA-Zigbee-Gateway/Bridge

Hi.

i have a small problem.

i have a POE Yellow but no CM4.
I currently use a dell optiplex 3000 micro together with either a Sonoff stick P or a Sky connect.

what i really want to do is use my Truenas server.
problem.
1: I dont want to try and passthrough the usb ports.
2: the server is not in house so even if i fix problem 1 i get the problem with communication to the house.
solution would be a lan attached gateway.
i have the sonoff ZB bridge with tasmota flashed but it is tooo unstable and i have problems connecting more than about 30 devices.

are there any good LAN zigbee gateways on the market that can be used with either ZHA or Z2M and can handle 100? devices ?