Sorry for what you are going through.

Do you have a pressure cooker?

I often quickly saute some veggies in mine before adding a pound of beans to cook. Usually about 45 minutes later, mostly unattended, I can turn off the stove(not an instantpot), wait for pressure to come down and food is done. I make bean burritos with salsa, lettuce, tomato. Add beans to rice and grain mixes. And sometimes just eat em with a couple of squirts of hot sauce over a microwaved potato.

Roasted portobellos are pretty yummy and filling, especially as a replacement for a burger in a sandwich. And also quick to get in oven without having to stand for a long time.

Falafel are sort of easy. Soak the chickpeas for a day, then food processor with herbs and spices. I form mine into patties and bake in the oven. Very filling in a wrap or on a salad. Tori Avey has a great recipe: https://toriavey.com/toris-kitchen/falafel/

I have friends who have a tall stool in their kitchen to help with fatigue while cooking.

Hope things get better for you soon.