You can ask the post owner to make it shareable.
How to make fb marketplace post shareable. Click on the three tiny dots on the top right of the post. Select the post that you wish to share. As indicated in the previous section, select your privacy.
The first one with the label “friends”. However, if you want your post to be shareable, you’ll need to change the privacy setting to “public.”. Open the facebook app and look for the post you wish to make public locate and open the facebook application on your phone.
Open facebook and go to your profile. The first step you have to follow is to log in to your facebook account on the app. Click on the security icon beneath your profile name, right beside the date of the post.
Open your facebook and find the post you want to make it to be shareable. Tap the three dots in the top right corner of the post. If you’re looking for how to make a facebook post shareable, the answer is as simple as clicking on “what’s on your mind” at the top of profile or feed page.
Then find the post you want to make shareable and click on the three dots of the upper right corner of the page. A single popup menu bar you will be going to see. If you wish to make a post in your private facebook group that can be shared by others, follow the below steps:
On your post history, find the one that you wish to share with others. Create the post on your own newsfeed/timeline and make sure that the post is. From your feed, click marketplace in the left menu.