Issue Connecting Dell XPS Laptop to Accer Monitor

@nspringm  I've never used HP's docks, but that shouldn't be an issue on its own.  Dell docks work with at least some non-Dell systems, and Dell systems work with at least some non-Dell docks.  I believe this is the correct HP Support page for the dock you have, in which case the only driver appears to be for the USB controller.  The displays should work without any additional drivers.  There are some firmware updates listed there, though.  Have you tried to install those.  (Hopefully they don't require being installed from an HP system the way some Dell dock firmware updates require using a Dell system....)

When you first connected the dock, did you see a prompt to "approve" the connection?  That's the typical setup for Thunderbolt 3 unless you disable Thunderbolt 3 security in your system BIOS, but I would strongly advise against that.  But if you didn't see that, then it's possible for charging to work even though nothing data-related would work.  Which brings me to my next question: Is ANYTHING other than charging working from this dock?  Do USB devices connected through the dock appear on your system?  What about the dock's audio or Ethernet controllers, even if you're not using them for audio or network?

Based on your display's input connectors and the available output connectors, a basic DisplayPort cable would be the simplest option.  And of course make sure the display is set to the correct input if you haven't done that.

Entering BIOS Setup and selecting "no security" for the Thunderbolt prompts worked. Thank you!

Are there any issues that I need to be made aware of now that I have made this change to my BIOS Setup?

Thank you for the response, @jphughan.

I may have been incorrect in saying that I have the appropriate drivers installed. Using the installer from the link provided, my laptop/installer is not able to recognize the dock once it is plugged in to my USB 3 port. I was able to charge my iPhone by way of the USB port located on the dock. 

@nspringm  Glad it's working, but that's definitely not an ideal way to run your system permanently.  The issue is that Thunderbolt ports allow access to PCI Express, which in turn allows direct access to system memory.  That means that when you run in No Security mode, a malicious user could potentially connect a malicious device to your system's TB3 port and dump the contents of your system memory, which might include sensitive information such as passwords, decryption keys, and personal information, depending on what your system was doing at the time.  This is precisely why Thunderbolt 3 defaults to "User Authorization" mode in the first place, in which case you have to approve each device that gets connected to your system before your system will interface with it.  (There's a newer security mechanism called Kernel DMA Protection that avoids this vulnerability without needing approval, but your system doesn't support that.)

Did you actually install those updates as I suggested?  If so, I'm not sure why you're not seeing the authorization prompt when you connect the dock.  To my knowledge, all Thunderbolt 3 peripherals are required to support at least the User Authorization security level in order to be certified as Thunderbolt-compatible devices by Intel.  So if you're not seeing that prompt, it makes me wonder if it's either a firmware glitch or due to outdated/missing Thunderbolt software on your system, because a Thunderbolt 3 dock should not require you to disable all security in order to use it.  But while you do have the dock working, are you able to update the dock's firmware at this point?  That might be necessary too.

If you're confident in the physical security of your system, then you might decide that using No Security permanently is acceptable, but again I would strongly recommend against that.  I would suggest doing a bit more digging to see if you can get to a point where you can enable security and then see that authorization prompt.  If you get there, then after you click "Always allow this device", you should be able to keep using the dock normally with security still enabled.

@jphughan, I wanted to circle back with you, as you've been extremely helpful today.

I went back into my laptop's BIOS and returned to default settings. From there, I downloaded the first update that you recommended in an earlier post. Upon restarting the laptop, I was automatically connected through to the external display. I am quite religious in checking for updates, so I was surprised to see that my device had not incorporated this update from 2019.

Again, thank you! 

@nspringm  Great news, and happy to help.   I'd install the remaining 2 updates just to be safe if you were missing that BIOS update.  And were you able to update the dock firmware?