Thanks to everyone for helping! i have successfully booted and loaded up DD-WRT on my little appliance bought from aliexpress
the listing was for: Celeron Jasper Lake N5105 Fanless OPNsense Router Quad-Cores 4*LAN 2.5G I226 Ethernet 2*DDR4 Firewall Appliance Pfsense ESXI
Working great so far but only just getting started! Huge thank you to everyone on the DD-WRT team for getting EFI support! not sure how to @BrainSlayer to thank him and check what details he would like to know about it.
It was very simple to image my NVME drive.. I used Rufus to write the image and put the drive in and it booted! thank you!