icloud didn't transfer all my photos to my new phone

Hello Lamees666,

Thank you for using Apple Support Communities. Based on your post, you've got a new iPhone 13 Pro (Congratulations!) and when you set it up, it hasn't transferred or synced all of your Photos. We'll do our best to assist.

If you're using iCloud to sync these photos, then we'd confirm the photos appear on the iCloud website: Sign in to iCloud

It sounds like they are on the iCloud website, since they sync fine with your iPad. It's always good to double check.

When syncing for the first time, it really depends on the amount of content it needs to sync at the network speed. We always recommend keeping the device connected to power and a known good working Wi-Fi network while its syncing.

Review the following for any help connecting to iCloud: If you can't connect or sign in to iCloud

We'd confirm you aren't using a VPN or security type software on either device: Check VPN (Virtual Private Network) and third-party software to help resolve network connectivity issues

Since you have access to the original device, you can go to Settings > [Your Name] > iCloud and disable iCloud Photos. Then we'd Restart your iPhone and then go back to Settings > [Your Name] > iCloud and re-enable iCloud Photos to push the sync again. Keep it connected to power and that good network until it syncs all of your photos.

Hoping this helps out, take care.