User should be able to add phone number to Phone Contacts from PowerApps
Currently, user have to do this manually bu copy paste , but there should be an option when user selects the phone number .
Please follow the below step.
1. Create Flow
2. Run Flow . Write formula with the below paramter.
SaveContactinOutlook.Run(Name.Text,txtContact.Text,txtContact_1.Text);Notify("Contact saved successfully in Outlook contact list ");
Hope this will resolve your issue..