Traffic Shaping - WiFi MediaBridge

[Crane_Train]

I need a hand setting up shaping to help prioritize media streaming from a Jellyfin and Navidrome server > content downloading over a wireless bridge.
When streaming media on my Nvidia Shield (192.168.3.20) served from my Jellyfin instance (192.168.2.70) while concurrently downloading content that saturates the wireless bridge, I experience playback lag.

Network Topology:

OPNsense is running on an N100 box.

Two subnets on dedicated interface ports:
    - 192.168.2.0/24 [StudyLab]
    - 192.168.3.0/24 [LivingRoom]

OPNsense box is physically located in my actual living room.

LivingRoom subnet consists solely of clients physically connected using an unmanaged switch. On this subnet is my streaming client, an Nvidia Shield (192.168.3.20).

StudyLab has all of my physical server hardware located in my study under a HPE J9774A switch (192.168.2.2), also currently unmanaged.
This is bridged to OPNsense using an ASUS AX56U in MediaBridge mode with an AX58U functioning as the upstream router in AP mode which in turn is plugged in to a dedicated interface port. Wired backhaul is not possible in this setup unfortunately.
Jellyfin and Navidrome are running in a compose stack at 192.168.2.70
Download clients are also at this address.


I tried to give this a go by creating a single pipe to encapsulate all up/down traffic across the bridge instead of dedicated pipes for each as it's the connection bandwidth being saturated that's causing me grief and that's bi-directional.
Unfortunately I've had no luck and the official docs aren't the best at covering this use case (or indeed, a lot of the variables in general).

Some help understanding the correct logic for traffic shaping for my scenario would be amazing.

Attached are some screenshots:



 

[Crane_Train]

attachments continued: