This was in France if that's a relevant clue.
Boeing has an issue where its radio altimeters are affected by C-band 5G transmissions. I believe maybe the pilots were relying more on the precision of the altimeter because their vision was impaired due to the bad weather? The whole 'turn off phones' instruction could be because people would follow the unusual request to turn off their phones instead of just telling them to put it in airplane mode (which is so common that some people just don't bother)
Whether electronic devices inside the plane are such problem I don't know.