Maybe you should try contacting guy who is working on Computer Module 4 raspberry pi devices, for running bitcoin nodes.
He is called Mirek and you can also find him by the name MirkoPC.
I think this is the RPi Compute Module 4 (CM4) project you are talking about. Looks like it would be a great node for home mining to!
https://hackaday.io/project/179571-bitpirat-computer-gen1I started working on a PoE powered version for myself, but lost some steam once I realized CM4s with 8GB RAM are totally sold out everywhere.
https://github.com/skot/bitcart