I was able to change it!
Settings–>Check out–>Check out language–>Checkout & system then do a control or command F to find the word usually and I was able to find the field that says “Pick up in five or more days” (or whatever time you chose in the settings) and changed the wording below it to “You will be notified when your order is ready”.
It is now showing this during checkout when the Pick up option is selected. I hope this helps!
