How can I connect two HP M27f monitors to my 2023 MBP using a single cable/dock?

The OWC Thunderbolt Hub might be able to let you connect two USB-C (DisplayPort) monitors or adapters (with resolutions of 4K or less) while taking up only one port on your 2023 (14" or 16") M2 Pro MacBook Pro.

https://eshop.macsales.com/shop/owc-thunderbolt-hub

I learned of this when replying to another question in these forums. See the Usage Notes and Display Notes on page 4 of the hub's User Guide, and the display support table on the main product description page (above).

https://eshop.macsales.com/tech_center/manuals/owc-thunderbolt-hub-user-guide.pdf

I haven't heard of any other dock or hub supporting this (yet). My guess is that this hub has one of the first implementations of some new capability defined by USB4 and/or Thunderbolt 4.

HDMI is bandwidth-limited. HDMI ports can't support multiple displays.

For TWO displays on one cable:

it needs to be a Thunderbolt cable connecting to a Thunderbolt Dock -OR-

a ThunderBolt Display that has an output port for another display.

Those HP MF27f appear to be HDMI-only displays, 1920 by 1080.

The Mac only supports at most TWO displays on one cable out of the computer when that cable is a genuine ThunderBolt cable, and is connecting to a first device that is a genuine ThunderBolt device (Dock or Display).

USB-C is not supported. USB-C has only half as many data pathways as ThunderBolt.

Grant Bennet-Alder wrote:

USB-C is not supported. USB-C has only half as many data pathways as ThunderBolt.

The USB-C (DisplayPort) implementation on the M2 Pro MBPs supports attaching a single 4K monitor. One 4K monitor has 4x as many pixels as a single 1080p monitor, so driving two 1080p monitors over one USB-C cable doesn't seem like it would be prohibitive in bandwidth terms.

It sounds like Macs don't support DisplayPort MST (multi-stream transport) for whatever reason.

sorry, my statement as written was not precise enough to stand alone.

I should have stated that USB-C is not supported FOR MULTIPLE DISPLAYS on one cable, the subject under discussion.

USB-C works very nicely for one display, provided cables are good enough and under 1 meter in length. It works fine with most single adapters as well.

an example of a display that can do this trick is the Apple Studio Display (5K Retina, US$1600). It accepts a ThunderBolt for its input, and provides 3 USB-C ports, one of which can be used to connect to a second display.