Silent/Ring switch

You're welcome, thank you for explaining so clearly!

Seems you would need to let Apple experts take a look at that switch.

If you are near an Apple Store, you could make a "Genius Bar" appointment.

They will look at it, evaluate the situation, and tell you.

( If it needed fixing, they would let you know the cost.)

How to search for a store:

Apple Store - Find a Store - Apple

How to make an appointment:

Genius Bar Reservation and Apple Support Options - Apple

Hi yousif87,

welcome to the Apple (user-to-user) Community!

Apple support has online articles (links below) that may help:

How to put your iPhone on vibrate, ring, or silent mode - Apple Support

and

Use the side, Home, and other buttons on your iPhone - Apple Support

All the best :-)