Zoom events - spekers no permission to start own cam

We have created one event in Zoom Event. Duplicated to test it. In a session - all speakers do not have cam. As a host I can ask them to unmute their microphone but not the camera. I do see any icon for the camera. I can promote them to panelist but still if they wanna start cam, they get a text that the host not allowed. I can not change the setting on web ZOom - automatically redirect to Zoom EVENT portal. ANy solution? experience?