Ann, do you have occupational therapists on the islands? They're not just for occupational stuff, but when they were working with Mum, it was all about her living independently and critically, safely at home, even with her challenges. Some of their ideas were just fabulous.
They suggested things like using a basket (a bit like a chip basket) in the saucepan when she was boiling her potatoes. When cooked, she could turn off the heat, lift the basket from the pan (and get on with her meal), then deal with the pan of water late - ideally when cooled.
If you can, maybe see if you could achieve a referral? If that's not forthcoming from your GP, the Age UK also offer such services.
Listening to your challenges, I reckon a perching stool would suit you well. You can do anything from nearly ignoring it, to just leaning back onto it momentarily, to letting it take your weight whilst supervising something cooking. And of course, it needn't be restricted to use in the kitchen.
Mum's was very much like this one, with removable arms:
https://www.amazon.co.uk/Multi-use-...36563970&sprefix=perching+stool,aps,-1&sr=8-5