In the MX-5 I have the NextBase 322GW with the ‘cabin view’ camera which works as a rear camera in a car the size of the MX.
We have a Garmin in the other car and I think the cables are the same, if not adapters are available.
For both cameras I find the software for the phone to be fairly awful, mostly related to getting the right bluetooth connection so more about the amount of different signals/devices around and isolating to the correct rather than the camera itself.
I fitted a Garmin mini2 dash cam, I ran the cable behind the trim. I didn’t want a distracting screen and its small enough to fit alongside the rear view mirror.
Works perfectly does what it needs to do
Are the recordings affected as if not why do you need to buy a new one. I don’t look at my dash cam unless I need to review footage so the screen could be blank and it wouldn’t concern me.
With the money saved not buying a new camera, buy more beer