Spotlight and pin: Participants don't see what host does when using audio mixer

We recently hosted a large hybrid event: live in an auditorium with mics and a PA system and 80 people connected via Zoom. To eliminate echo and feedback, we used an audio mixer with presenter mic output going to the in-room PA system and also to the mic input on the host laptop to route to Zoom participants. In the reverse direction, we had headphone output from the host laptop routing Zoom participant speech to the audio mixer and out to the in-room PA system. The audio all worked perfectly. The problem was that because in-room audio was routed through the host laptop, Zoom considered the host laptop the active speaker anytime mics from the auditorium were active and Zoom featured the video of the person operating the laptop at all times except when another Zoom participant spoke. We thought this might happen and tried to prevent it by spotlighting and pinning video from 2 cameras turned on the in-room presenters. The spotlights and pins worked on the host laptop's display, which was projected to an in-room screen, but the spotlights and pins did not appear on Zoom participants' remote displays. This also produced a recording that showed mostly the face of the person operating the host laptop (certainly not what we wanted). Can anyone tell me how to configure settings in Zoom so that we can get it right the next time? With audio routed through a host laptop, how do you successfully spotlight or pin presenters on cameras that have joined the Zoom session so that Zoom participants see those video streams highlighted?  Also, how should we configure recording settings to ensure we have silent video from in-room cameras (the spotlighted/pinned ones) captured as well as video of active speakers? I hope I have explained this well enough to get some good advice! Thank you!