How to transfer data through move to ios after setting up the iphone already

You can transfer data manually by following the steps in the following link :

Move content manually from your Android device to your iPhone, iPad, or iPod touch - Apple Support

You would need to wipe the iphone with Settings, transfer or reset iphone, Erase all content and settings, then do the setup as from new (see process in blue above your thread). You will lose anything you already put on your new iphone.

Well you could take an iCloud backup of everything you got on your iPhone after you set it up. Some apps like WhatsApp, need to do their own iCloud backup. Please ensure you do this for any such apps you care about. Then attempt erasing the phone and starting all over again, like @LD150 mentioned above. Get everything from the other phone and then restore stuff from the iCloud backup, once you’re done with move to iOS successfully. This way you wouldn’t lose what you recently saved, before doing a full reset.

That cannot be done, the only way to restore an iCloud backup is to a fully wiped phone. Cannot restore backup and add to existing data.

The OP would have to COPY stuff to iCloud Drive. Not the same thing.

Similarly Whatsapp icloud backups can only be restored after uninstalling the app and losing all existing data,

I wasn't patient enough to try to do it manually I tried to push it through again as if I was trading my phones off again is this going to interrupt my service