> I think the postgresql maintainers don't claim to support moving a database from x86 to arm without a dump-and-reload

I would be very surprised by that because that means replicating a database between the two platforms would lead to corruption.

btw, this bug breaks dump-and-reload too. If you use partitioning, each partition is dumped and restored individually. In this case though, you'll get an error when you try to restore the data because it's trying to put data in the wrong partition. That's better corruption, but still an issue.

The physical replication docs say "the hardware architecture must be the same", though they don't define "architecture".