I'm not sure this is something the people at Displaylink can deal with right? Isn't the firmware dock specific?

What you need to do, even if seems tidious is find or a windows PC to do it, or have a partition in your mac with windows to do it. I did the later in the past to upgrade my D6000.

NOTE: Is not a DisplayLink issue updating a dock D6000, so I don't think they would reply.

WD19TBS NOT Connecting to my MAC book pro m1
 

Hello
i am trying to connect my mac book pro using the dell docking station WD19TBS WITH MY three dell monitor but for some reason is only showing as mirror display is coming up but its just mirror there is no option to extended my three monitors can someone help me to fix this issue

The docking station you are using does not have DisplayLink technology inside of it, which means that DisplayLink will not be able to assist you.

The dock is a Thunderbolt docking station that has a DisplayPort Multi-Stream (DP MST) hub inside of it.

Mac's do not support DP MST, which is way your displays are being mirrored. This is no workaround for this behavior.