Page looks different on iPhone compared to both Squarespace editor and Android

As my title describes already - I don't understand what the issues is but for some reason the Squarespace page I designed isn't rendering or viewing on iPhone the way it should and it's just on iPhone, I don't have this issue any where else (it looks fine when I load/view it on Android & the editor as well).

Attached are screenshots of the page on iPhone, Android and the mobile view on the Squarespace editor as well.

And as you can see it only looks different on iPhone (the buttons, fonts and stuff looks weird and different).

Please, is there a fix for this? Has anyone experienced this issue?

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