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The iPhone 13 mini is dead, leaving small phone lovers in a lurch
(arstechnica.com)
This is a most excellent place for technology news and articles.
In Settings -> Accessibility-> Touch -> Assistive Touch you can configure a small button the floats on the screen (you can move it around), providing access to all sort of gestures and functions one handed.
Tried that but none of the gestures include "go back" nor "swipe right" (the closest thing is "scroll right"). Even used a custom gesture as well and that didn't work.