Hey tefica,
Perhaps the iPhone SE is classified as a later generation model as it uses the A9 chipset (newer models).
I would try using the ‘r.MobileContentScaleFactor 3’ for the iPhone SE profile. If that does not work, try using a 1 instead of a 3 for scaling. I gathered this from our documentation which you can navigate to by following the link below.
Performance Guidelines for Mobile
Let me know if this was the correct solution or if you need further assistance.
Cheers,