How do I get my dock on external monitor?
 

I've just set up my Dell D3100 with an Intel MacBook Pro running Big Sur. I have three monitors working, plus the built-in screen (I'd much rather NOT have that, but I understand that "clamshell mode" is not currently supported).

My problem is that the dock is only showing on the built-in screen. When I previously had two monitors connected by normal HDMI adapters, the dock was on both screens.

Can I get the dock onto one or more of the external monitors? I've had a good look round System Preferences but can't see anything appropriate.

Hmm, should have played around some more before posting on here...

Seems like the dock does appear on the extension monitor if I move my mouse to the bottom of the screen and wait a short (but not consistent) time. I'd rather it was there all the time.

"Automatically hide and show the Dock" was NOT checked, although after checking it and unchecking it I seem to have a fixed Dock on one screen. That will probaby do me, but is there a way to get the dock on all screens?

I think I'm OK now except for one fairly serious annoyance - my notifications all come up on my laptop screen and not the screens in front of me - so I keep missing them.