Short of stepping through the JavaScript line-by-line, how do you tell the difference between these two dates?
3/11/2021
3/11/2021
The difference is one was formatted incorrectly, and the other was formatted correctly. One is 2021-03-11, the other is 2021-11-03.
Even having been told that there's a difference, you cannot know which is which.
Even if you think you know because you found an unambigious date like 31/11/2021 somewhere, you still shouldn't be confident because there are many sources of dates, and they're formatted by many different pieces of code. Some may be doing the "right" thing, some may be using US formatting. A complex web application like the Azure or AWS consoles might have literally thousands of sources of dates formatted by a thousand different pieces of code.
Before the 12th of the month, they're all totally and utterly useless for 96% of the world unless they use ISO 8601.
BTW: I just tested this with the Azure portal by clicking through some Log Analytics related things. I got it to show me 3 different date formats, 2 of which would have been ambiguous earlier in the month, and one of which changed between two tenants. So even if you learn which parts of the UI you can trust to be correct, switching tenants will invalidate your experience.