How to Share Live Photos
Your Live Photo must be converted to video format before you can post it on the Facebook group. To do that, tap the Share icon (boxed arrow up) and select Save as Video.
For Live Photos with Bounce or Loop Effects, you need to convert your Live Photo into video format using Lively app to make sure it plays properly. Here's a detailed guide on how to do this: How To Quickly Convert Live Photo To Video On Your iPhone