Photos from iPhone synced to iPad Air 4th generation

When setting-up your new iPad, did you set-up as a new iPad - or instead use any of the available “transfer” features?

If your existing devices are in proximity of the new iPad during initial setup, you are offered the facility to transfer settings and files - either using QuickStart or an existing iCloud/iTunes backup.

If you have genuinely created an entirely new AppleID account, perhaps the easiest method of resolving your current issues is to start again - and setup “as new”:

Settings > General > Reset > Erase All Content & Settings

Be aware that if your new iPad has already synchronised with iCloud, any photo’s/Calendars/Contacts and Passwords may have already been uploaded and stored in your iCloud storage - and these will reappear after a fresh setup attempt. Provided that you have demonstrated that you are only using your new AppleID for all Apple Services, then you can safely delete any information that you don’t want on your new iPad.

Remember that in using an entirely separate AppleID for your new iPad, any purchased Apps or Media will not be available to your new iPad - unless or until the items are purchased again.