Hi arlo33,
Thanks for contacting Apple Support Communities!
We understand that several functions of your iPhone are grayed out and inaccessible, correct?
If you haven't yet, we'd suggest that you update the iOS after creating a backup of your iPhone as outlined here: Update your iPhone or iPad - Apple Support
"Learn how to update your iPhone or iPad to the latest version of iOS or iPadOS.
You can update your iPhone or iPad to the latest version of iOS or iPadOS wirelessly.
If the update doesn't appear on your device, use your computer to update your device manually. Learn how to update your device manually if you're using a Mac with macOS Catalina or later, or if you're using a Mac with macOS Mojave or earlier or a Windows PC."
If you're still experiencing the same behavior after updating, it's likely your iPhone will require service. When these features are grayed out and inaccessible, it is typically due to hardware rather than software. We'd suggest that you reach out to Apple to determine your options with you. You can find their contact details here: Contact Apple Support
Take care!