I am also experiencing difficulties accessing my Power Automate flows. While I can access OneDrive with my Hotmail account , I am unable to load my flows within the Power Automate environment. I have attempted logging out and back in with my Outlook account, and i don't have that issue.
I suspect there may be an ongoing issue with the Microsoft server or maybe something relate with Hotmail maybe..
In the meantime, to run the flow, you can recover it from your local files. This involves navigating to the following directory:
C:\Users\{user}\AppData\Local\Microsoft\Power Automate Desktop\Console\Workspace
Please note that loading the recovered flow may take some time.