Instagram confirmed with TechCrunch that payments for booking appointments for restaurants or salons is currently live "for a limited set of partners." The site notes that dinner reservation app Resy has clients whose Instagram Pages offer native payments for booking a table. Instagram also told TechCrunch that users can look forward to buying things like movie tickets in the future. The feature is different from shopping tags, a feature Instagram added in 2016 that pulls up a retailer's website when you tap through a photo of a product you want to purchase. Given Instagram's emphasis on shopping, it's easy to see native payments being used for even more things in the future.
Update 5/3/18 4:21 PM ET: This post has been updated to clarify when the appointment system was first introduced; it was last year, not last month.