I use the 4 SFP+ Mikrotik switch behind it. Unfortunately, I tried to hook it up with a 10G Wiitek transceiver and it appeared to work at first, but speeds would drop down to under 1mbps or drop randomly. Did some testing and it turns out the router-transceiver combo wouldn't do 2.5G. Hooked it up with a 1G transceiver and everything has been smooth since.
I have AT&T 1G fiber. 2 and 5 are available at my house. Going to try a Mikrotik transceiver to see if I can get it to talk at 2.5G. If so, might upgrade to 2 gig internet!
Here's the Amazon link:
Firewall Hardware, VPN, Network Security Appliance, Router PC, Intel Celeron J4125, RS34g, AES-NI/4 x Intel 2.5GbE I225-V LAN/2USB3.0/VGA/HDMI/Fanless, (Barebone, NO RAM, NO Storage, NO System) https://www.amazon.com/dp/B09PHHXN9V/ref=cm_sw_r_apan_i_AF4026BY5067MAJ77H0W?_encoding=UTF8&psc=1