Realign rear camera external lens on iPhone SE

I have recently bought a second-hand iPhone SE in decent condition and while the rear camera lens cover is not scratched, it is slightly crooked.

To remove it, am I better off removing the white glass panel surrounding the camera and getting in via the back, or by unscrewing and opening up the phone from the front and pushing the lens through?

There’s some dust visible in there too, so my suspicion is it’s been (incompetently) replaced before.

Is it easy enough to realign and affix the existing component, or would I be better with a new one?

I’m not looking for the quickest/easiest solution, I’m looking for what gets the tidiest and most reliable end result.