Wow - there is a rancher-desktop, might have to check this out...
I've had no problem building images on apple silicon but use docker desktop for local dev, if you need to build for x86 you'll need to install buildx, I've not tried rancher-desktop myself, I use rancher for our clusters, I've also used dockers kubernetes extension which works fine on mac but it uses a lot of resources so generally we've found docker lighter weight for debugging and developing individual containers then we push them out via a toolchain to a development cluster.
If I get a chance I might have to give the rancher-desktop tool a go... appreciate my use-case may not match yours, initially when the apple silicon macs came out docker was very buggy but its much more stable now.