You want the government to tell a private business how they run their business. That’s not regulation, that’s Nationalization. Regulation is “don’t hire anyone under 18 years old” or “please don’t use this substance we’ve determined is harmful to your health in your pre-packaged potato salad”. Nationalization is “The government will determine how much of a profit you make and will determine who you do business with, EVEN when there’s no national security risk because that other business is based in the US.” And, if the government is going to do that, they may as well just develop their own mobile platform IF your “essential products” are so essential that every person in the US should have access to it (which is highly dubious to anyone NOT living in a suburb).
You know, let’s get back to that, it’s QUITE a stretch to say ALL of those to require access from a mobile OS platform. Only ONE possibly does, COVID tracking/tracing, and that’s not “essential”, it’s a nice to have. Mobile ticket sales, Mobile banking, mobile payment? Yes, all of those of
course would require a mobile phone. However, subtract “mobile” and you get banking, public transport and payments which are all handled perfectly well without a phone. Emergency alerts, personal messaging works fine via SMS and doesn’t require a smartphone. I just signed up for medical services on my laptop, but I could have done so using a telephone… a plain telephone. The vast majority of Americans never have to deal with customs declaration or visa applications, so including those are fairly questionable at best. It’s like they were added to pad the list because you thought it would have been too short otherwise

BUT even so, they
can be handled in person. For the times that videoconferencing would be
required for a job interview, any PC with a camera would do. Tax account administration? Ok, now you’re REAAALLY padding it! I can see how a fairly affluent class of person might see all of these as “requirements” as much as they’d consider lawn care and a full home security system “requirements”.
In going over your list, know what I’ve found? Even if I wanted to
force myself to do them all using a smartphone, engagement with an AppStore of any kind still isn’t required for the majority. Companies aren’t going to be getting rid of their websites any time soon because a large portion of the population still use computers for all those activities. And, they’re preferred in a lot of cases because your personal info is left on a hard drive safe at home and not on your person.
I think that, if you HAVE to start with a premise of “I WANT THESE COMPANY’S APP STORES TO BE REGULATED” and then build backwards to build a case you’ll end up with a case that doesn’t hold up well, as I’ve shown. What SHOULD be done is first build the case for why they need to be regulated and define why. The problem, though, is looking at it this way means that you end up with Google’s and Apple’s engagements with the developers of Candy Crush, Fortnite, and Angry Birds should be regulated. Because THOSE things… THOSE really DO require interaction with an App Store.