The MacBook Pro 16-in is an extremely powerful machine. However, you have determined experimentally that you can not have "ONLY" 6 other Apps open and expect great network performance in Zoom.
Your report appears to show that Spotlight Indexing was active while you were running your report, as shown by mdworker activity.
Your report suggests that substantial iCloud sync-ing was going on while you were running your report. In addition, OneDrive also has the potential to punish performance (especially network performance) but it was not running when you made your report.
¿what is the transmit rate for your (presumably Wi-Fi) network connection? is it fast enough for Zoom conferencing?