https://www.asus.com/displays-desktops/monitors/eye-care/vc239h/techspec/
Asus VC239H is a 23" display with 1920x1080 pixel resolution and a 60 Hz refresh rate. It has three video inputs: HDMI v1.4, DVI, and VGA.
The Mac Studio should be able to drive it directly with
- a HDMI to HDMI cable, or
- a USB-C (DisplayPort) to HDMI adapter cable
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With regards to the Sabrent dock, here's something that might be of possible interest:
https://www.quora.com/Why-does-my-new-out-of-the-box-display-port-to-an-HDMI-female-adapter-not-work
If the DisplayPort output on your Sabrent dock does not have the "dual-mode" feature, and the adapter that you were using with it is a "passive" adapter that relies on the "dual-mode" feature, that might explain why you could not get a signal. If that was the cause, getting an "active" adapter (one that did not depend on the source device doing part of the adapting work for it) might let you make a connection through the Sabrent dock.