According to some owners of Nokia 7 Plus, a new software update is available for this great phone. This update seems to be a new build of Android Pie marked as V3.39B, which probably brings the much-needed optimization of Android Pie. It is 462.8 MB large so the download should be much faster. Anyway, the update is still not available for my Nokia 7 plus, and it seems that HMD released it for the Indian market first.
Do tell us if you got the update (mention where are you from), and how the installation went.