Can I connect more than one game to Facebook or my Apple ID?

You can only connect one game to your Facebook account and/or your Apple ID.

We advise you to play only one game save per device.
If you’re playing more than one game on multiple devices, you can keep playing them but you cannot sync them across devices. Therefore, you’ll miss out on the helpful benefits of being connected to Facebook (or your Apple ID) and if you have to switch to another mobile device, you won’t be able to take the progress with you.

Can I switch users on my mobile device?

If your game is connected to your Facebook account, you can switch users on one mobile device. This feature comes in handy if you’re sharing your device with a friend or family member.

To switch users, follow these steps:
1. Open Pearl’s Peril and tap the cog icon in the upper left corner of your screen
2. Tap ‘My Account’ and open ‘Account Management’
3. Tap the 'Switch User' button

You will have to confirm that you want to log out of your account(s) and then Pearl’s Peril will reload.
Now you can sign into a different Facebook account to restore different progress. Please note, you must be signed into the other Facebook account already, either in the Facebook app or in your device’s browser.

Sharing one device among family or friends can be fun and very convenient, and the ‘Switch User’ feature is only possible if the games are connected to Facebook.

Please also keep in mind that as per our Terms of Service 2.2.6: “You shall not have more than one account per platform or social network, at any given time, and shall not create an account using a false identity or information, or on behalf of someone other than yourself.”

Similarly, Facebook has similar limitations regarding Facebook accounts. “It's against the Facebook Community Standards to maintain more than one personal account.”
https://www.facebook.com/help/975828035803295