Unfortunately RPi was not a good choice to begin with for anything you intend to rely upon. I was mad for years about this watching people buy overpriced kits that I knew would be disappointing. From 2018 I looked into the feasibility of designing a reliable aarch64 board with two nvme SSD slots. Costs of that custom design were too high then the pandemic supply chain shortages killed feasibility even further.

The biggest time waste in the world is unreliable hardware. Umbrel and the appliance distros should really focus their efforts on ordinary PC hardware deployment and TWO INTERNAL DISKS.