You don’t hear back because almost always your bug is a duplicate of some other one. They can’t share the original with you because it contains data from another customer or from inside the company.

Almost nobody is the first reporter in an OS with billions of users. The only useful thing about those long dupe lists was being able to scan them for one with easier repro steps.

But sometimes that duplicate marking is wrong or some subtly different issue so they ask you if it still reproduces in whatever version contains the fix before closing it.