I've tried hundreds of times over the last 3 months to get my OnePlus 7Pro connected via YourPhone.
My Microsoft account can see my phone in Devices but YourPhone will not connect.
It used to work but stopped after a Slow ring build about 3 months ago. I am now on the latest Dev build.
I've been through all troubleshooting on all the forums but nothing gets me past "We're checking one more thing..."
Other similar Apps, such as AirDroid, work but not YourPhone.
I have reset my phone and reinstalled Windows 10 from scratch, checked the router, firewall and everything on
https://support.microsoft.com/en-gb/help/4531298/troubleshooting-the-your-phone-app
https://www.guidingtech.com/fix-windows-10-your-phone-app-not-working-issue/
If only the App would say what the ".... checking one more thing..." was.
I've not experienced such frustration with Microsoft since the days of Windows Vista !