A few key points to consider: 1) If the downstream traffic (flowing from the MX down to the access point) already has the correct DSCP tag (should be DSCP 46 (EF), not CS7 which is reserved for network protocols the AP will tag it at layer 2 with the correct 802.11 UP marking of 6 which translates to the voice queue. However that is also contested since zoom does not use a separate stream for their audio and thus should actually be put into DSCP 34 (AF41) with a layer 2 tagging of 5 (video queue). 2) Upstream traffic is dependent on the tagging the endpoint gives to the traffic so the network can't even influence how fast those packets reach the air. 3) Meraki needs a way to just match on existing DSCP value to modify or add layer 2 marking manually.
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