[NAME]  -  Guess they assume if you order a PC without an add-in GPU, you'll only want to connect a single monitor... Win 11 will probably automatically install the driver for the USB3>HDMI dongle, if one is even needed.  Just make sure the dongle supports Win 11 and the "recommended" (aka: "native" or "optimal") resolution of the monitor to be connected to the dongle. To use daisy chaining,  make sure your monitor(s) support MST and also check the specs for the CPU in your PC to see if it supports either (High Bit Rate) HBR2 or HBR3, which impacts the max resolution achievable when daisy chaining monitors: That resolution info may help you choose monitors, if you don't already have ones that support MST.  
I just spent £1600 on a Dell XPS 8960 and found out it only supports 1 single display output when used with the onboard graphics (Intel UHD Graphics 770). To say I’m disappointed is an understatement, I expected at least DP + HDMI, or USB-C with display support with a dongle, but it seems this is just not possible. Absolutely crazy that a base spec £500 Vostro desktop has better display functionality than Dell’s top of the line XPS!
XPS 8960, only 1 display output?