I use a free app on my ZS gen2 but should work on mg4 as it thinks my car is a 4
https://play.google.com/store/apps/details?id=com.mg.zs.mgzsev
This is the OBD2 adapter
https://amzn.eu/d/7jRDfjO
Here is a screenshot
That's just one page it has lots of love data I will put up a video at some...
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