I hate to play Debbie Downer here, but if the numbers in the U.S. are any indication, you aren't going to see anything near "normal" at the 20-30% fully vaxxed mark. Most states really didn't see any significant drop in infection rates, really, until we approached the 50% fully vaxxed mark. My current location is right around the 55% mark now, hopefully hitting 60% before the end of June, and only in the past two weeks have we really started to see a drastic decline in new infections. Testing positivity rate has now stabilized at under 1%, and the state government is promising to significantly roll-back restrictions once we've hit 60% and almost completely eliminate mandates once we've hit 70%.
Stateside, it's not DHS that's presenting the biggest roadblock to vaccine passports, which I believe the majority of Americans want. Rather, it's idiot fucking anti-vaxx Republicans in Congress and, worse, Republican governors (Desantis) hoping to run for POTUS in 2024, passing laws in their own states banning vaccine passports and being cheered on as folk heroes by FoxNews and other MAGA mouthpieces.
But I wouldn't worry to much about those assholes. In the end, the Biden Admin SEEMS to favor the vaccine passports, and the federal government is free to launch its own nationwide database and registry and issue its own forms of passports available to all citizens, and I'm sure the U.S. could then coordinate with other nations, like Japan, on a system of reciprocity. If fucking morons like Desantis want to ban the use of that database in Florida, by all means, please do. All that means is no Florida residents will be able to enter Japan, and believe me, that is a VERY, VERY GOOD THING.
Any state that elects idiot anti-vaxx, anti-mask MAGA sycophants who want to ban vaccine passports...you really, really don't want those voters coming to your town.