I don’t know about PA liquor policies, but I do know they have a good selection of beer at the grocery store, but they have to actually enter your driver’s license number to clear the age check.
We don’t do anything so stupid here in Ohio - they just look at me, see wrinkles, grey in my beard, and that generally life-has-given-me-a-beatdown look in my eyes and say, “Go on, get outta here, you need it!”
Minnesota was the worst - virtually no beer or wine in the grocery stores, and absolutely no Sunday sales, period. You forget to get beer for the Sunday football, you’re stuck drinking kool-aid.