Closest overall is the Minions cafe next door, if you can wander in there freely (I do not know if it is reserved for people ordering from the Minions Cafe).
Closest nice outdoor seating area is probably the Central Park area - head behind the Transformers building towards the water, there are a bunch of nice benches at the edge of the lagoon (across from Mel's Diner). There is often a lot of street entertainment in this area too.
There are a few scattered benches along any of the streets, or over by Rip Ride Rocket, but they're less scenic. Or in front of the Fallon ride.
There is also a park area across from the Minions cafe & the Fallon ride, but I believe it is a designated smoking area so may not be the best for enjoying popsicles. Looking on the App, it is not listed as a designated smoking area - hopefully that really is the case now.