Not much familiar with stripe, but I can see they allow saving contacts. From their site ^[1]

Once you have made a payment in the Strike app, the individual that you transacted with will be saved as a contact. You can view your contacts by visiting your Account screen and tapping Contacts. Contacts are organized by Username (Strike users and Lightning addresses) and Send Globally recipients.

If your Send Globally recipient has changed their receiving information, such as their phone number, or bank account details, then you’ll need to remove them as a contact and enter their updated information the next time you send them money.

To remove a contact, simply visit your Contacts, swipe left on the contact’s name, and then confirm the removal.

Now, considering this account above has no contacts, I can however see there are options to send to strike users by username and to LN addresses. It's clear from the last screen that contacts are added to the address book when a payment is received. Isn't working like this? Would be nice to see some screenshots from you and see which functionalities you'd like to have-where.

1. https://strike.me/faq/how-do-i-manage-my-strike-contacts/ ↩