Sorry to hear about 2024, your mum's passing and your health!
My mother had vascular dementia from diabetes and ended up passing away 6 months after my father, of what we are convinced was a broken heart.
People will say all sorts of things, sometimes the most comforting is just a touch on your elbow and no words. If there are no words to say, don't say anything.

I gave up smoking on Sept 8th 2022 and seeing your mam with her fag and drink I can still smell it!