[ununoctium87]

Atlassian products are varied across different jurisdictions. Chances are that if you’re using an Atlassian product in the USA, all your data is hosted in the USA too.

Source: I work for Atlassian, platform stuff

[csharptwdec19]

At the end of the day though, Atlassian won't even sign NDAs with it's clients.

Make of that what you will.

[scblzn]

I'm an EU customer but my Atlassian Cloud contract is still between me and Atlassian Pty Ltd in Australia.

So wherever the data is, the problem is still the same in my opinion.