Right, so the 'new shots' will be labelled Comirnaty, which legally have FDA approval, which likely have yet to be released everywhere as vaccines centres are likely still using up their old stock of Pfizer which, again legally, do not have FDA approval, but only EUA (Emergency Use Approval).
No. They're the same. They both have full approval for those 16+.

Fact check: FDA has fully approved Pfizer's coronavirus vaccine
Claims that Pfizer's vaccine is not fully approved for the majority of Americans are wrong.
www.usatoday.com
Are you comparing Covid to the Flu? I thought it was a big no-no to describe this as a bad flu although the epidemiologist Professor Ioannidis doesn't seem to think so.
To be fair there was an Israeli doctor last year that did say that if the flu is a 1 out of 10 in terms of seriousness, then Covid-19 would be a 2.
No, I'm giving an example of how approvals are viewed on vaccines. Some people might think that vaccines that are identical but have different names need separate approval, even though ones that have their formulation changed every year are just fine (which I think they are).
My guess is that either the rigor and size of those studies wasn't enough for an official recommendation yet, or that the studies hadn't undergone formal review. (Whereas the Pfizer vaccine one had those and did). I think I have some posts upthread with the excess mortality in the US last year from COVID and it's a lot bigger than the difference between a small and big flu season, for example:Shockingly bad but not surprising, particularly when there are multiple studies around the world reflecting those particular set of vitamins do assist against Covid-19.
Excess Deaths Associated with COVID-19
Figures present excess deaths associated with COVID-19 at the national and state levels.

As for the 2nd article provided - linking spending time outdoors to skin cancer because everything one does has to be viewed at the extreme to give the perception that it doesn't work. It is a great marketing and misdirecting ploy.
It was the first CDC page that came up. The page I linked starts with "Spending time outdoors can improve overall health and wellness. The outdoors offers many opportunities to be physically active. Time outdoors may also promote mental health and stress reduction. While enjoying the benefits of being outdoors, people can decrease skin cancer risk from too much UV exposure by using sun protection." with a link to a page on physical activity and its benefits. It then notes "Having little or no sun exposure may put a person at risk for low levels of vitamin D, but too much UV exposure from the sun or artificial sources can increase risk of skin cancers and eye disease. "
Here's a CDC blogpost from 2017 pushing outdoor activities: Step it up outdoors | Blogs | CDC.
Iirc cities were asked(?)/required(?) to have public parks and outdoor activity space during some pandemics in the early 1900s?