Data point:
I wanted to test out a gift card, so I bought a $10 gift card online to a restaurant in Austin. The POS uses Toast (the transaction description even starts with "
TST*"). I bought it on Saturday, June 22 and got an email about the Resy credit on Monday, June 24. The credit transaction was backdated to June 22.
I also had a strange $10 transaction show up as pending for a restaurant in Massachusetts. I don't recognize it. It says the method is card entered manually. I'm not sure what to make of this, but I'm not worried about it because there is an additional matching $10 credit that is pending.