I have a couple of environments setup for Power Automate, one of which is named Prod. For the past several months on a daily basis I've been working on several flows in this environment with no issues. Today I went to edit one of them, and on the flyout for dynamic content it doesn't show anything but a message which reads "No dynamic content available."

I found the same issue with all other flows in the environment. I tried creating a new flow as a test, selecting a trigger for SharePoint - When an item is created or modified." None of my SharePoint sites are displayed in the dropdown list -

If I switch over to the default environment, I'm able to pull up dynamic content just fine. If I create a new flow, it is able to connect to my available SharePoint sites.
All of this is being done under the same account, so I'm at a loss as to why everything in this environment is suddenly unable to connect back to my SharePoint data.
Edit: Confirmed now it is happening in multiple environments.