Difficulties with filling the tank all the way up

Most modern cars/trucks have narrower fuel filler necks and quite a few have a flapper inside that keeps fuel from splashing back.

There’s this retrofit item that installs into an earlier filler, but this particular one has been out of stock for at least several months

Unleaded Gas Fuel Fill Neck Restrictor W/ Flapper For 2" Necks

Other options would be use a later filler neck upper and adapt it for use on your car.

But beyond that, yes, it’s very difficult to keep the modern gas nozzles with an evap system from splashing back when filling one of these cars. It’s just the new style nozzles paired with the classic style filler. You can’t use the auto-shut off feature, and I’m about 50/50 listening for the change in the sound of the fuel depending on how noisy the station is.