Making a status public on Facebook means that it will be visible to everyone. This can be done on the mobile application and on the website.
Steps
Method 1 of 4: Make an existing status public on the mobile application

Step 1. Open the Facebook application
If necessary, enter your username and password and click on Log in.

Step 2. Click on your profile picture
This will take you to your page.

Step 3. Click on the menu of the status you want to change
It's the arrow-shaped button in the upper right corner of the window.

Step 4. Click Privacy Settings

Step 5. Click Public
The post is now visible to everyone, whether or not they have a Facebook account, and whether or not they are a friend of yours on Facebook.
Method 2 of 4: Make a new status public on the mobile application

Step 1. Open the Facebook application
If necessary, enter your username and password and click on Log in.

Step 2. Click Express Yourself

Step 3. Click Friends
When you write a new post, this button is located under your name.
On the website, this command is in the lower right corner of the window dedicated to new publications

Step 4. Click Public
Once your post is live, it will be visible to everyone, whether or not they are your friends on Facebook.
Method 3 of 4: Make an existing status public on the website

Step 1. Open Facebook in your browser
If necessary, enter your username and password and click on Log in.

Step 2. Click on your profile picture
In the menu bar at the top left, it is on the right. This takes you to your page.

Step 3. Click on the menu of the post you want to edit
It's right under your name. It indicates the current status of the publication by three icons: a padlock for Private, a person for Friends, or a globe for Public.

Step 4. Click Public
The post is now visible to everyone, whether or not they have a Facebook account, and whether or not they are a friend of yours on Facebook.
Method 4 of 4: Make public a new status on the website

Step 1. Open Facebook in your browser
If necessary, enter your username and password and click on Log in.

Step 2. Click Express Yourself

Step 3. Click Friends
This button is located in the lower right corner of the window.

Step 4. Click Public
Once your post is live, it will be visible to everyone, whether or not they are your friends on Facebook.