My apologies for the delay in responding. As of a check just a minute ago, it's now, naturally, syncing immediately. ☹️
But to fill in the requested information anyway:
I have it on:
iPhone Xs running iOS 15.7
iPad Air (4th gen) running iPadOS 15.6.1
Lenovo Legion something or other, laptop running Windows 10 with all the updates Microsoft has shoved at me.
Networking - ISP is Xfinity. SpeedTest says wired connection has 850 mb/s down, 40 up ping 16ms; WiFi is 409 down, 38 up, ping 19 ms on the iPhone. Nobody's watching movies or gaming.
Evernote is version 10.46.7 on Windows,
But I would swear on a stack of bibles that Tasks, in particular, using the default Task note, didn't replicate for days. Never saw a conflict with the task note, but for others every once in a long while I would get a conflict, with the some new data in one note and some in a conflict note, but mostly nothing would happen for days or even weeks.
This afternoon, though, dang thing is working like a charm. First I remember that happening in forever. Or ever. Since they decided the "sync" button was obsolescent.