From a business perspective, I think given the choice to lie a little bit or be brutally honest with your customers, lying a bit is almost always the correct choice.
My ideal would be if regulations which made it necessary that downtime metrics had to be reported with at most somewhere between a 10m and 30m delay as "suspected reliability issue".
If your reliability metrics have lots of false positives, that's on you and you'll have to write down some reason why those false positives exist every time.
Then that company could decide for itself whether to update manually with "not a reliability issue because X".
This lets consumers avoid being gaslighted and businesses don't technically have to call it downtime.
