If you have wireless charging then you should definitely get the dongle. I have one for those times I need stability. Get a thin lightweight USB C extender so the dongle is not getting in the way.
I have one that has hdmi and usb as well so I can use my phone in desktop mode on a monitor, then I use parsec to get in my VM and I have access to a full desktop experience
For others considering this, keep in mind that not all phones support external monitors, they need specific hardware for it. Pretty much all Samsung S phones support it, Pixels do not. So check if your phone supports external displays before you buy any hardware!
Ah butts, you’re right, the first guy said “mobile” and I didn’t read it correctly. I can’t figure why they would ever need a connection like that for their phone, though.
I, too, have shitty wireless. In fact, for my work laptop, that's exactly what I do. So much more reliable. Way too many wireless connections on too many channels close by.