Dear Ryan,
Based on the error message "Too many requests to Graph API. Please try again later.", it seems that too many requests are called in the flow which may break the limitation of the flow mentioned in Limits and configuration - Power Automate | Microsoft Learn and causes the error of the flow.
You may run turn off the flow temporarily and run the flow later to see the result.
You may also check whether there are some running processes in the flow history and cancel them manually first.
Meanwhile, you can save the flow as a new flow, delete the original one and run the new flow in the test mode to see the result as well.
Solved: 429 Too Many Requests Error - Power Platform Community (microsoft.com)
Welcome to share any updates when you have time if you need further help on this issue.
Thanks for your effort and time!
Sincerely
Cliff | Microsoft Community Moderator