Set norms for synchronous meetings and the use of video cameras.
Turning video cameras on should not be mandatory.
Have short conferences to have face-to-face with students. Encourage, but do not insist on the use of video camera for discussions, virtual office hours, and consultations.
You may ask students to make themselves visible if they are asking/responding to a question; otherwise, use chat.
In larger classes, some professors tell students to turn their camers off during lectures.