“I’ve never seen anyone complain about short sleeve button up shirts ”
In Israel short sleeves button-up shirts in the chareidi world are frowned upon after bar mitzvah.
I have a rebbe friend who took his high-school class to visit a major godol in Bnei Brak. When the boys came in, many in short sleeves, but all in button-down shirts, the godol asked the Rebbe why his talmidim weren’t dressed. Not surprisingly, the rebbe needed the nuance to be explained to him; he (D”L, R”L) apparently wasn’t aware of this inyan.