Jittery macOS mouse cursor when hovering over links
So happy to hear I'm not the only one with this issue. Bought a new MacBook Pro 16 inch earlier this year in May, having that issue since.

After I bought it, I noticed the issue. Contacted Apple, told me to send it in for repair or exchange it for a new one at the retailer. So I replaced it. Brand new MacBook, same issue (however only after logging in with my Apple ID).
We're now deep into August and I've been in contact with several people at Apple since May. To no avail. We're now trying to escalate the issue to other departments, but not sure how long this will all take. The general comment they've made is &quot;that the resolution might come in the form of an update, so keep an eye out on that&quot;..

Some things I've noticed that might be helpful for others to know:

At first I thought the issue was with external displays. But after further debugging it seems the issue has to do with my GPU (AMD Radeon Pro 5500M 8 GB). The reason it seems the  issue has to do with an external display is that the MacBook will switch from the embedded Intel UHD Graphics card to the better GPU when plugging in certain displays.
You can try the above by opening something like Final Cut Pro without an external display plugged in. The issue will then appear since the MacBook switches to the other GPU. You can also verify this by disabling &quot;Automatic graphics switching&quot; in the &quot;Energy Saver&quot; settings.
A clean install doesn't fix the issue. It also doesn't seem to be a hardware issue since the problem appeared on two separate MacBook Pro's.

I'll update the answer when I hear back from Apple. If anyone else has more info, glad to know.