Hello @Jacob Page !
Welcome to Microsoft QnA!
Facing some issues on WebApp connectivity considering nothing has changed could have a lot of reasons.
First of all examine all your logs and try to activate Application Insights for a period of time to drill better into logging
Use the "Diagnose and solve problems" , https://learn.microsoft.com/en-us/azure/app-service/overview-diagnostics
Check Service Status for you region might be something else on Azure not your fault
Check Service Limits , it could be a limit you reached , highy unlikely but worth checking https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/azure-subscription-service-limits
Upgrade your Plan to another Tier and check the behavior , you can do that easily !
If nothing comes up , check with Azure Support !
I hope this helps!
Kindly mark the answer as Accepted and Upvote in case it helped!