maybe first post the output of uname -a on the raspberrypi3B+

I was wondered homeassistant is running well on the orangepi pc2.(image armbian with pre-installed homeassistant). The raspberrypi3B+, also 64 bit, running raspbian, is very slow. For that reason I would make a test to replace raspbian by armbian. This way I can check if it is the hardware of the pi or raspbian image that make it slow.

if nand-sata-install is not maintained is there a replacement

Nope, my build is based on current mainline and even build on target (aarch64). I.e. no cross-compiling involved. Oh, by the way, in my build bootstd scans any attached storage for a valid bootflow and uses the first found one. The used hardware interface dosen't matter and even network is valid.

After a lot of attemps with kernel versions and so on without any result this is the simple solution: Buy an USB to analog adaptor for 6 euro's brand MOSWAG, that's all folks.