ConnectCore6UL antenna - safe to power-up without fitting?

Is it safe to power-up the ConnectCore6UL and even potentially have WIFI running, without an antenna connected?

Or to put it another way - does the ConnectCore6UL have antenna detection?

If it is not safe to run without antenna (I expect it’d cook itself if no antenna detection is implemented) we will have much more hassle during manufacturing test of product including this module.