Lufthansa bans AirTags in checked luggage
Note that the reason for airport mode is a courtesy to cell-phone carriers.  It's not any air safety issue.  Rather, 300-500 cell phones all trying to contact the next cell tower, multiple times per minute, would wreak havoc on cell service.https://www.inverse.com/article/51015-cell-phone-use-on-airp...At one point, when both cell phones and laptops were new, there was perhaps a risk to the airplane's electronics.  Modern cell phones have been steadily tuned to reduce interference with other electronics though - good thing, otherwise you couldn't use them in a modern home with its dozens of connected devices.  And modern avionics have been shielded to protect them from outside electronic interference - also a good thing, otherwise the next terrorist could simply turn their laptop on.  The ban on electronic transmission is one of those regulations that was a response to technology at a particular point in time but now is largely vestigial.  You can tell because it's rarely enforced, and yet bad things do not occur just because you forgot to turn your phone to airplane mode.