@mommacandy What you are dealing with has got to be so difficult! Are there times where he help out or shows his appreciation? According to what I found from the VA, he is eligible for all VA benefits. I suggest you call a VA hospital near you and find out what they can do to help.
https://news.va.gov/102866/the-immigrant-military-members-and-veterans-initiative-and-how-va-supports-immigrant-veterans/#:~:text=Who%20is%20eligible%20for%20benefits,to%20those%20who%20live%20abroad.
Who is eligible for benefits?

“All eligible Veterans are entitled to VA benefits regardless of their immigrant status. The same applies to those who live abroad.

Unfortunately, identifying these Veterans – especially deported Veterans – has been challenging. VA has worked closely with LULAC, Repatriate our Patriots, American GI Forum and the American Legion for assistance, and with DHS to identify Veterans who have been deported and those who have been repatriated.”
Is this something you can do ?