If I create a registration form with added fields do I have access to those fields when creating a notification email for a different form like with other user meta (user email)
If I create a registration form with added fields do I have access to those fields when creating a notification email for a different form like with other user meta (user email)
Yes, you can access user meta in notifications or as the default value for fields. You would use the {user} merge tag and append the key name to it {user:KEY}.
So for example if I have user meta using the key/name of phone then to display this in notifications or as the default value for a field you would use this merge tag: {user:phone}