I really appreciate this, thank you 
It seems to work fine on D0 without a pullup resistor, so hopefully this means there is one built into the RTC module. I modified it so it now wakes up every minute, and I will keep it running through the day to check if there are any mistriggers.
The xiao esp32c3 is a tricky little fellow, but I am happy to have discovered this forum with knowledgable people!
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