Unfortunately your results are within the ranges which means your GP and endo are probably quite happy with your progress - doesn't mean they are optimal for you though.
I've got Graves and was treated with block and replace. I took 40mcg carbimazole daily which totally blocked my own thyroid production then I took ever increasing doses of thyroxine until I was taking 75/100mcg levothyroxine a day. I stayed on that until I was euthyroid then all medicines were stopped at once and everyone waited to see what happened.
Gradually my TSH has crept up to about what yours is - I'm convinced I'm heading towards becoming hypo but because I'm within the range no one is interested.
In the meantime, have you had your vitamins D and B12, ferritin and floaters tested.
You want the results of all of them to be high in their ranges to feel good. I also take 1000mcg vitamin C plus zinc every day. CoQ10 or ubiquitous whichever is the best deal when I order. I use a vitamin D spray every day, take a sublingual B12 tablet, five Brazil nuts (for magnesium) and I'm working hard at being GF because I understand it helps reduce antibodies. I try to stick to a healthy diet with fruit and vegetables, fish, chicken, not too much red meat etc avoid fizzy drinks, caffeine all that sort of stuff.
I know exactly what you mean by going 'through the motions' - I was thinking that just yesterday I'm just like you, I have a lot to be thankful for - don't have the lovely grandchildren but lots of other good things, I'm pretty sure I'm not depressed yet I kind of feel my get up and go has got up and gone at the moment.
Check out your vitamins and minerals and see what they are like - then go from there. Have you kept notes of all your blood tests with comments on how you felt at the time? I know from doing that where my body felt best ( definitely NOT where I am now unfortunately even though I'm within range!)
It was my pharmacist who told me to take the vitamin C as soon as I started the carbimazole but I was already taking it after I had a tooth out and the patient information letter had that written on it - helps promote healing apparently - so I just continued to take it and all the things listed above even though I've been in remission for quite a while.
Hope you find your vra, vra, vroom soon. 😊