If you want to hide your Mastodon profile's follow and follower lists, here's how to do it:
1. Log in through your server’s website or web app
2. Click on your profile icon (your profile picture), then click "Edit profile"
3. Click on the "Privacy & Reach" tab at the top
4. Scroll down to the option marked "Show follows and followers on profile", and UN-tick it
5. Click the "Save changes" button at the bottom