Sony took a few months to prepare the release of Android 10 for its latest set of smartphones. Apparently, it did not take long enough as people have been complaining of experiencing a multitude of bugs. The situation is so dire that Sony has ceased the rollout of Google's latest OS to the likes of the Xperia XZ2 and XZ3.
https://www.notebookcheck.net/Fail-Sony-stops-Android-10-rollout-for-the-Xperia-XZ2-XZ3-because-of-multiple-bugs.453776.0.html