Keto is an intervention, not a long term solution. You will strain your thyroid, mineral levels, and sex hormones over the long run.
Suggest pivoting back to natural carbs (fruit, honey, milk) to maintain those vital aspects of your body.
Meat is great. As is raw diary. Eggs. Honey. Fruit. And even some rice and potatoes, for hard physical workers of sport and otherwise.
Like many carnivore advocates say: plants don't want to be eaten.
Check out Ray Peat and Saladino's "Animal Based" Diet.
https://heartandsoil.co/blog/the-ultimate-guide-to-the-animal-based-diet/
Discussion
Don't take my word for it.