If you can prevent yourself from mouth breathing while you sleep, you might get the best results in a month - literally light years ahead from the orthodontic alternatives.
Tie a shirt around your chin if you can’t get that mouth tape etc.
The brand I use is - Breath Tape | BreatheWell
I woke up with the most refreshed look and facial symmetry, my palate feels so much wider.
Ever seens I been growing a beard, my whole goatee area is so symmetryical now, around lips , chin etc.
This stuff is out of this world.