iPhone won’t send or post etc

Hello Unlevel.

Thank you for using Apple Support Communities. Sounds like you're experiencing issues with some buttons not allowing you to complete tasks. If so, we'd like to help out. If this issue is occurring across all apps, you can try restarting your iPhone. This is a simple step that can sometimes resolve various issues:

Restart your iPhone - Apple Support

If your display isn't responding or working properly, this resource might help you:

If the screen isn't working on your iPhone or iPad - Apple Support

1.) Make sure that your screen is clean and free of any debris or water.

2.) Disconnect any Lightning or USB-C accessories. If your screen works after removing an accessory, try using a different outlet, cable, or charger.

3.) Remove any cases or screen protectors.

If you confirm this issue is only occurring with third-party apps, try deleting the app and then reinstall the app to see if that helps:

1.) Delete app

2.) Redownload app

Additionally, if you have any pending updates available, it would be a good idea to install those updates. Keeping your device fully updated can help with software conflicts. Just in case, the following resource can guide you through the update process: Update your iPhone, iPad, or iPod touch - Apple Support

1.) Back up your device using iCloud or your computer.

2.) Plug your device into power and connect to the internet with Wi-Fi.

3.) Go to Settings > General, then tap Software Update.

4.) If you see two software update options available, choose the one that you want to install.

5.) Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do.

We hope this information is helpful. Cheers.