Fix Flutter Notification Bugs

Hello

i need a 3 bugs to be fixed in my app.

First bug : Notification was working and when redo some other bugs maybe not working now.

Second bug : email config as when user register it give thank you for sign up and also in same email it give an OTP which should happen.

3rd bug : OTP email always need to press resend to get it.

Also i will need to test my flutter code + Need to upload to playstore and IOS.

Give me your offer or simply range offer.

I have lastest SDK flutter.

thank you