The Geniatech XPI-3566-ZERO is a tiny single-board computer (SBC) that rivals the Raspberry Pi Zero 2W in size. The XPI-3566-ZERO contains a few advantages over its Raspberry Pi counterpart though, including multiple memory options.https://www.notebookcheck.net/Geniatech-XPI-3566-ZERO-New-Raspberry-Pi-Zero-2W-alternative-combines-Rockchip-RK3566-with-up-to-8-GB-of-RAM.738759.0.html
"Geniatech is not selling the XPI-3566-ZERO directly, but you can request a quote"
Hardly an alternative then