On Tuesday, 31 March 2020 09:21:58 UTC+1, John wrote:

You can do that by wiring two PIRs in parallel from the same supply.
But check the PIRs are OK being wired in parallel. It's a while since
I did this and at that time some weren't at all happy with a live
"coming back at them" (as it were).



Would something in the circuit prevent a problem?

Relays could. I'd try them connected first.