Broke my foot in september 2022, fully healed now, but i wore a brace, and it caused trauma to big toe, and now constant numbness and toenail, possibly affected, and not sure if will fall off. will i regain feeling or have permanent nerve damage?

Pressure on your big toe with the brace can cause it to be numb for quite awhile, even a few months. The toe nail falling off is not uncommon if there was butting up of the toe at the end of the toe. This can even happen with running shoes that are too small and constant butting up of the end of the toenail. The nail usually grows back and is not a prooblem.