Sometime connections are broken and there is TSG guide to troubleshoot the issue
https://docs.microsoft.com/en-us/power-automate/triggers-troubleshoot. We understand that there is no RCA for these type of issues as its beyond the scope but to improve the experience is it possible that if user fix the connection from Data > connection then he does not have to fix i.e. reassign the connection to Flows. This issue is very annoying for some customers specially where there are so many flows under 1 account. Also, once the connection is broken and if some indication can also be given to customers why the connection is broken then it will be really very useful and bring more transparency.