I think the OP will know her own mother better than we do. Yes some people would hate this but not everyone.
OP
When my Nana was in hospital I sent her a goody bag with everything individually wrapped so she could open one a day, with it being a hospital stay a lot was toiletries. Now the shops have opened you will be able to get samples, sample perfume bottles are tiny, about 3cm long and less than a cm wide.
I blatantly told Boot's staff why I wanted them and they went and found a few for me, not just perfume but powder, soap, bath oils etc.
My dad was 80 a few years ago and one thing he often uses is a magnifying glass.
Tickets to an event or a promise to take her to one.
Seeds / bulbs if she has a garden, if she doesn't then a window box as well.
Vouchers / gift cards for supermarkets, or her favorite shop.
Hand made cards / drawings from the youngest members of the family.
A framed photo or photos of the family.
A family tree showing all her offspring, every family has an arty person who could do this.
Mini bottles of champagne, wine, spirits.
Something she can do with her grandchildren, painting, baking even lego.
Sponsorship of a guide / assistance dog. My parents got a sponsorship of a golden retriever for their golden wedding.
Coins, a set of 'old money'.
A box of Christmas cards with the envelopes already addressed.
80 piece jigsaw.
Ok I may have more ideas after I have had coffee.