Is HP E233 Monitors compatible with Mac and Kensington SD4750P docking station?

Welcome to the Apple Support Communities.

Unfortunately, since these are not Apple products or sold on the Apple Store, you'd need to contact the manufacturer for help: Contact a third-party vendor - Apple Support.

Jack

That Dock connects to the Mac with a USB-C cable, only. Macs do not innately support more than one hardware-accelerated display over a USB-C connection, and that dock is not a DisplayLink display.

so it will not be possible to use that Dock to connect TWO displays to any Mac.

Kensington does appear to make a similar dock that supports a DisplayLink display, which uses software to fake a display for slow-to-change data like stock quotes and program listings.

Your display look like 1920 by 1080 displays with these possible connections:

(1) DisplayPort (DP) 1.2

(1) HDMI 1.4

(1) VGA

so with some straightforward adapters, these could be directly connected without the need for a dock, but you would need two cables.

The Mac only supports multiple displays on one cable when connecting to genuine Thunderbolt devices -- so the first device must be a ThunderBolt dock or ThunderBolt display. The second can be whatever ports the first device has.