When you add the Power BI report as a tab in Microsoft Teams the date format is shown as US format mm/dd/yyyy.
The date format is fine in Power BI desktop and on the Power BI (browser) as long as you set the right language in your browser.
However the Android mobile app and Teams desktop app still show the wrong format.
I have searched the forums but have only found a bug in the past that they say is now fixed.
The date format is in a slicer and a card to show when it was last refreshed.
I have set the region on the user setting in microsoft teams.
AFAIK, these datetime format is based on device setting , maybe you can try to modify language and region settings on your android device and try again.
Both on android phone and windows 7 PC browser I believe I have set the language and region correctly but still shows the date in the wrong format. I have even tried IE as well as firefox and chrome.
Have found part of the solution from this https://superfarb.com/power-bi-customising-date-format/
Change the language to defualt (browser language) and the date format displays correctly in all browsers as long as you have set the browser language correctly.
So the browser now shows the format correctly however Teams and Android App still don't, Is there a place the language is set for these that I am missing?