This article will show you how to show comments that you have hidden.
Steps
Method 1 of 2: Using the Facebook app on iPhone

Step 1. Launch the Facebook app

Step 2. Tap ☰
This icon with three horizontal bars is in the lower-right corner of the screen.

Step 3. Click on the page you are managing
A list of such pages is located at the top of the screen.

Step 4. Tap a post to view comments
Hidden comments are grayed out.

Step 5. Press and hold the gray text
A menu will open.

Step 6. Tap Recover
The comment will be displayed on the page.
Method 2 of 2: On Facebook

Step 1. Go to www.facebook.com

Step 2. Log in to your account (if necessary)

Step 3. Click the down arrow
You will find it in the upper right corner of the screen next to the question mark.

Step 4. Click on the page you are managing

Step 5. Find a post with a hidden comment
Such comments are highlighted in gray.
If there is only one comment left for a post and it is hidden, click the button with three blue dots to show the comment

Step 6. Click Recover
You will find this gray button below a hidden comment. The comment will be displayed on the page.