Everything’s probably fine.
After saving the world by defeating Kang in the Quantum Realm, Scott and his family return to San Francisco and celebrate a nice “fake” birthday for Cassie.
At the present time this location is unknown. It could be a real restaurant from the London area or a soundstage built to look like a restaurant.
This is an unknown location on MCU: Location Scout. If you have any information about the whereabouts of this location or any other tips, please send them in to MCULocationScout@gmail.com
(Ant-Man and The Wasp: Quantumania, 2023)