Thanks for the replies, I will do the card from her to the 1 couple who brought her presents and a card last year. Maybe leave it at that. She will be fussed over at the care home as they are fantastic with her.
Last year she had been in hospital for weeks after a fall, the hospital could not rehabilitate her so sent her to the care home for "Time To Think" (yes, its a thing). I went to the house fully expecting to collect some cards for her, and not one. There is an elderly gay couple who always made an effort for her at Christmas so I knew they would be leaving gifts on the doorstep, bless them. So I phoned them to let them know the situation, which is how she ended up getting something last year. No other family member made contact, but since I informed my brother that social services were involved, he has made some effort to help, at a distance, with the financial situations threatening letters from bailiffs etc as there is no power of attorney and Mum lacks capacity.
I have felt angry actually at the total lack of support from anyone else, its like once you get dementia you cease to exist. Only professionals want to help. She has had some visits from the priest, as I got in touch to ask if he could continue with the home visits.