Google is now showing for some urgent cares and other medical offices, how long it would take to get an appointment at that facility. This shows both in the local pack and also in the specific local listing.
Joy Hawkins spotted this and posted on X saying, "Google is showing a new type of justification that highlights how quickly you can get an appointment. It looks like they are getting this from your booking software that's integrated with your Google Business Profile."
Here are those screenshots - I should not, I cannot replicate this:
I suspect this is being pulled from their integrated appointment systems with Google Business Profiles.
Forum discussion at X.