Esim

[shekhawati]

What will happen to esim if 

I rest my phone from setting 

I reset my phone with hard reset (power + volume button)

Reflash my phone.

[Debasmit_Mohanty]

If you have the QR code in your email den you can access it again without any hassle

[babatherockstar]

Nothing, go for it

[Debasmit_Mohanty]

Yes

[YuvixM]

If you format or hard reset nothing will happen to esim, it will work as it is working prior to reset as esim is not dependent on the mobile memory/space.