Issue with libmraa "unable to locate package"

I had my rockpi 4c with sata-penta hat working until an update clobbered the OS.

I’m having a difficult time getting libmraa onto my rockpi4c. The buster-stable has the libmraa. But the bullseye-stable does not. When I install dietpi buster from my original download, the first thing it forces is in upgrade to bullseye. The version mismatches are preventing me from activating the sata-penta hat, fan and top display.

Anyone have some ideas here? I emailed setq but no reply in 3 days.
Thanks.