Angels have the Phone Box
Hi applevwindows10 and welcome to Tenforums.
This forum is not a part of Microsoft, so if you'd like to get feedback to them, you'd be best off using the Feedback app which is integral to Windows 10. That way, you can be sure someone from Microsoft sees it. (Of course, you need to get online to do that! )
Now, on to your problem.
I assume when you say "direct cable connect" you are referring to plugging an ethernet cable from your desktop's NIC to your modem or router. Is that correct? If so, then you are correct, there are no settings to be specified when doing this; you simply plug in each end. If your router/modem is assigning IP addresses correctly, you should get right online without issue.
Things to check would be your wired NIC drivers, your ethernet cable, and your modem/router port.
For example: in Device Manager, right-click your wired NIC and check for updates. Swap out the ethernet cable to make sure it hasn't gone bad. Verify the light on the back of your computer at the NIC port is illuminated. Switch ports on your router/modem to see if that makes a difference. Verify the light for that port is lit when connected. Call your ISP and ask them if they can "see" your computer's NIC (Yes, they can see it if it's working). If they can't, you may have a dead NIC.
Now, if you're trying to make an ad-hoc connection to a MAC's internet connection, well, that's a different story.