How do I fix Control Center stuck issue on my iPhone 16 Pro?

Please try a Forced Restart. The purpose of this is to get rid of any software bugs that can be causing this.

• Press and quickly release the Volume Up Button
• Press and quickly release the Volume Down Button
• Press and hold the Side Button until you see the Apple Logo (Ignore the Power Off slider midway)

You may try some of these steps, please check after each step...

1. Sometimes, a simple restart can resolve temporary software glitches. Turn off your iPhone, wait for a few seconds, and then turn it back on.
   1. Restart the device. That's it.
   2. Still not solved --> Force restart iPhone - Apple Support