Usually the lenses can be swapped between fpv cams.
(The ones with 1/3 sensor that are about 26mm square in form )
Sometimes , I have found , a lens can be a bit too long ( in physical length) and start to foul the board just as focus is achieved.
This is not good .
Maybe an idea to ask Surveilzone their opinion.
They market foxeer and have had good communications previously.
Maybe consider getting a Möbius action camera lens as the quality is good. Though the cheap ones are pretty good.
Using gopro lens is also talked about but not something I've tried.
Are you looking to increase / decrease fov ?