bevy_crossbeam_event is used at run time in 4 crates (of which 2 optionally).

Depender (with downloads and own rev deps) bevy_crossbeam_event version
800 bevy_ios_iap ^0.5
700 bevy_ios_alerts ^0.5
650 bevy_ios_notifications ^0.5
500 bevy_ios_gamecenter ^0.5