Hey Dfnrail,
If you haven't already, be sure to complete the guidance found in the "Before you start" section of the guide you recently viewed. Specifically with updating your Apple Watch, paired iPhone, and carrier settings. Here's that list and a link to the guide, just in case: Set up cellular on Apple Watch - Apple Support
Before you start
• Make sure that you have the latest software on your iPhone and your Apple Watch.
• Check for updates to your carrier settings.
• Make sure that you have an eligible cellular service plan with a supported carrier. Your iPhone and Apple Watch must use the same carrier,* and you must be within your carrier's network when you set up cellular on your watch.
• If you have an enterprise or corporate cellular service plan, check with your company or carrier to see if they support this feature. Pre-paid accounts and some older accounts aren’t currently supported. To make sure that your account is eligible, contact your carrier.
* An Apple Watch that you set up for a family member can use a different carrier than your iPhone uses.
If all of the above has been completed and the behavior continues, see if fresh connections help:
Let us know how it goes.
Take care!