Why i am not able to press on cellular data icon kknowing that it is working and also not able to press into my profile

You are on Low Power Mode.

When Low Power Mode is on, your iPhone or iPad will last longer before you need to charge it, but some features might take longer to update or complete. Also, some tasks might not work until you turn off Low Power Mode, or until you charge your iPhone or iPad to 80% or higher.

Low Power Mode reduces or affects these features:

• 5G (except for video streaming) on iPhone 12 models
• Auto-Lock (defaults to 30 seconds)
• Display brightness
• Display refresh rate (limited up to 60 Hz) on iPhone and iPad models with ProMotion display2
• Some visual effects
• iCloud Photos (temporarily paused)
• Automatic downloads
• Email fetch
• Background app refresh

• When Low Power Mode is on, the battery in the status bar will be yellow. You'll see a yellow battery icon  and the battery percentage. After you charge your iPhone or iPad to 80% or higher, Low Power Mode automatically turns off.

• On iPhone 12, iPhone 12 mini, iPhone 12 Pro, and iPhone 12 Pro Max, Low Power Mode disables 5G (except in some cases like video streaming and large downloads) and also disables 5G Standalone (where available).