All of my contacts didn’t switch over
When I transferred my data to my new iPhone. Not all of my contacts switched over. Was there something I did wrong? Is there something I can do to get all the missing contacts into my new phone
Contacts sync to your email account(s); they are not part of a backup, so they will not be restored by restoring a backup. The same is true of calendar events. If you set up your email accounts, and in the process turn on Contacts, they should all come back.