By default, the platform does not have this option. You can use the following CSS code to remove the featured image.
Please follow the steps below:
1. Go to BuddyBoss > Theme Options
2. Under Custom Codes, enable CSS
3. Append the following:
.single .post.full-fi figure.entry-img, .single .post.full-fi-invert figure.entry-img { display: none; }
4. Save changes.
Without CSS:
With CSS: