Yes, they agreed to my Nov start date but the rules state they delay 6 months before they begin paying. So they started pay in April. Our first payment actually showed up in Aug. 4 month lump sum, then regularly monthly payments began in Sept.
If you haven’t created an account with Social Security, you should set that up. It will show your husbands reported income throughout the years and it will also show is estimated payouts.
Within his account you will be able to apply for his disability.
I’ll be happy to answer any questions you have.

Yes it is, I recently filed on behalf of my wife. I did everything online, on the Social Security website. They mailed me a packet/questionnaire. I filled it out for my wife and mailed it back to them. It took me about 4 1/2 months, but it was only delayed waiting on medical records. It was right in the middle of the Covid outbreak and everything was running slow.
I filed in March or April of this year, but I back dated it to November 2019, which is when I quit work to take care of her.
Hope this helps, good luck to you.

That does change things. My wife is only 61, so applying for disability allowed her to draw her money early. The amount is what she would have received at full retirement.
If your husband took social security early, applying for disability may increase his draw to the full retirement rate. If they approve back pay that would be a benefit as well.
I’m wondering if someone from Social Security would advise you of the best course of action or stay neutral and advise you to consult a lawyer ???

Yes, dementia is considered a disability. My husband had filed for disability in 2017 for 3 herniated disks in his back. The first two times he was denied, so i hired a lawyer to handle the 3rd appeal. In 2018, my husband was diagnosed with dementia and by the time the appeal went before a judge he had gotten far worse. At the hearing, my husband was asked many questions, including what city he was in at that time and of course, he couldn't answer. The judge decided at the time of the hearing that he was too disabled to do his previous job - driving a truck, and granted disability. After the hearing, we were paid for all except for 5 months from the original application date.

Thank you I’m sure I’ll have lots of questions my husband does have an account so I’ll go to it and hopefully get started.
How is your wife ?