It is VERY confusing. Intentionally so I think. Yes, I want to hear some attorneys weigh in on this.

Did they approve the application... meaning they accepted it and it's now in the system now so they can go through the process of approving the product? That's what it sounds like to me.

You took the words right out of my mouth, OP.

Its fully approved for 16+ year olds. The EUA is just for 12-15 year olds.

People need to stop posting that it wasn't approved. It makes you all look bad. It was approved by the FDA. People need to stop the nonsense.

From the linked pdf in the OP:

On August 23, 2021, FDA approved the biologics license application (BLA) submitted by BioNTech Manufacturing GmbH for COMIRNATY (COVID-19 Vaccine, mRNA) for active immunization to prevent COVID-19 caused by SARS-CoV-2 in individuals 16 years of age and older.

BLA Approval = FDA Approval

From FDA's site:

https://www.fda.gov/vaccines-blood-biologics/development-approval-process-cber/vaccine-development-101

By submitting a BLA to the FDA, a company is seeking permission to distribute and market a vaccine for use in the United States. FDA evaluates the data to determine whether the safety and effectiveness of the vaccine has been demonstrated and whether the manufacturing and facility information assure product quality and consistency. After its evaluation, FDA decides whether to approve (also known as to license) the vaccine for use in the United States. If FDA approves the vaccine, the company is permitted to market it in the United States for use in the population for which it is approved.

Here's the relevant bit buried far away from general perusal but posted immediately here

https://greatawakening.win/p/12jwR2bzJB/full-fda-approvalfake-news-eua-s/

The others are correct.