Broken iPhone

Hi, my 2 year old daughter broke my new phone which is 12 pro Max’s back screen. I’m currently living in Pakistan and there is no Apple store here. I will be visiting the UAE in July (God willingly) and only can show my phone there and then at the Apple store. It’s working perfectly fine, camera, sound, port, touch, everything is perfect but the back screen has been cracked badly, if I gently rub my fingers around the back without looking at it it won’t feel anything sharp or edgy., smooth as it was just when I see it it’s baddd. Secondly how long does it take to repair? Can it be repaired same day in the store?

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