I have testosterone defiency because of subclinical hypothyroidism and I want to know if this depletion will be recovered after hypothyroidism treatment. 18 year old male?

Good first step. It’s worthwhile to try to correct the hypothyroidism (which we wouldn’t really call “subclinical” at this point if it’s causing a testosterone deficiency) and see if your testosterone levels increase subsequently. Be patient, though, as this may take some time - like several weeks to months. Better to try this than to start testosterone supplementation at your age and in this current context.