Being quiet in a group isn’t being checked out. Sometimes it’s just thinking before speaking, which is rare.

Talking gets read as engagement and silence as absence, though neither is reliable. Some people are assembling something before they say it, and the pause is the work rather than a gap in it. The loudest contribution in a room is frequently the least considered.

If you are the quiet one, stop treating it as a fault to correct and say the thing once it is ready. If you are not, make room for whoever has not spoken by asking them directly rather than waiting for a gap. What comes out is usually worth the wait.