more information.
Government website (I often find these websites worse...obfuscating, you know, not all that clear...but, maybe there is some info in there)
https://www.usa.gov/disability-benefits-insurance
+++
and here's the website of US Senator Tammy Duckworth.
Senator Duckworth is a combat veteran who was wounded in action. She is a retired Army National Guard lieutenant colonel.
A combat veteran of the
Iraq War, she served as a
U.S. Army helicopter pilot. In 2004, when her helicopter was hit by a
rocket-propelled grenade fired by
Iraqi insurgents, she lost both legs and some mobility in her right arm. She was the first female double amputee from the war. Despite her injuries, she sought and obtained a medical waiver that allowed her to continue serving in the
Illinois Army National Guard until she retired as a lieutenant colonel in 2014.
And so, since she lost both legs, I would clearly assume that her and her office are very big advocates for the disabled and intimately familiar with the disability process.
https://www.duckworth.senate.gov/
You might think, "Oh, I don't want to bother a US Senator over my problems...but, you know, that is exactly why they exist, to help people. I had problems getting disability. We went to my Congressman's office. An aide was extremely helpful. Got everything going. Smooth sailing..just because of that one helpful person...