Is it likely for a hardware firewall from Alibaba have back doors?

I am looking to build a OPNsence firewall with either an SBC or similar hardware.

I found this on Alibaba:
https://m.alibaba.com/product/1600447328120/Fanless-Mini-PC-2-5G-LAN.html

It seems like a good option, but I do hesitate because I feel that is is not unlikely for there to be a back door built into it (motherboard?). Is this a legitimate concern?

I am also looking similar option that is made by seeedstudio, it just doesn’t have 2.5gbe ports. I less concerned about a potential back door …

alibaba back firewall hardware privacy