This article explains two easy ways to view your share statistics on Facebook, including how many shares your post has received and who shared it. Instructions apply to desktop and mobile users.
How to see who shared my post on Facebook (2023)
If you’ve recently posted something, the easiest way to see if it’s been shared is to check your notifications. Select the alarm/bell icon in the top right corner of Facebook or open the Notifications page. Find the notification that mentions your post and you’ll see who shared it and when.
Your profile is another place where you can see how many times your Facebook post has been shared and who shared it. Here's how it works from the Facebook website:
Go to your profile and scroll until you find the post you are interested in.