To lock an album in the Apple Photos app, you can follow these steps:
1. Open the Photos app on your iPhone or iPad.
2. Navigate to the album you want to lock.
3. Tap on the "Select" button in the top right corner.
4. Select the photos you want to lock by tapping on them.
5. Tap on the share icon (square with an arrow pointing up) at the bottom left corner.
6. Scroll down and select "Lock."
7. You will be prompted to set a password or use Face ID/Touch ID to lock the selected photos.
This will lock the selected photos in the album, and you will need to enter the password or use Face ID/Touch ID to access them.
