To fix under warranty in Russia it is impossible
Promises this problem just replace the display.
Since the question price is not so low, there is an option softwareo decision (transfer sensitive areas down by exactly the width of the "missing" strips)
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here one of the mods to expand the settings.
It will add the menu "Touch" or "Touch", which shifts the sensitivity area
At the time, faced with this problem on the first iPhone, decided exactly