Your projects don't move to a new phone on their own: back them up with 1SE Cloud Backup on the old phone, then restore them on the new one.

1SE Cloud Backup needs a Pro subscription, which you can start in the app.

This will create a backup file of all your projects and save it to your account.

Choose the most recent backup file from your account. The app will then restore all your projects to your new device.

Your projects are now on your new phone.

For the whole procedure end to end, including moving between iOS and Android, see How to Move to a New Phone.