Mute bell icon disappeared

ssi6 wrote:

On the link you sent, my screen doesn't exactly match either of those. I have no cellular icon like on the right but I do have the others.

Did you follow the directions for rearranging, removing and restoring buttons?

Rearrange Control Center

You can rearrange the buttons in Control Center by following these steps:

1. 1. Touch and hold the bottom of the screen, then swipe up to open Control Center.
   2. Scroll to the bottom of Control Center, then tap Edit.
   3. Drag a button to a new location.
   4. Tap Done when you’re finished.

Remove Control Center buttons

You can remove the buttons in Control Center by following these steps:

1. 1. Touch and hold the bottom of the screen, then swipe up to open Control Center.
   2. Scroll to the bottom of Control Center, then tap Edit.
   3. Tap  in the corner of the button you want to remove.
   4. Tap Done when you’re finished.

To restore a button you’ve removed, open Control Center, tap Edit, then tap  in the corner of the button you want to restore. Tap Done when you’re finished.

What version of watchOS are you running? You mention iOS 8.8.1 (something I don't think ever existed) but iOS is the operating system for iPhones.

If you mean you have a version of watchOS 8, you can find instructions for editing the Control Center here:

Use Control Center on Apple Watch - Apple Support