...is referred to as version 10, prior to that there was Pie (version 9). After Pie, Android stopped naming the OS version after deserts. Only the newest, premium phones get version 10 currently. My Samsung Galaxy S9+ currently has version 9 and it is supposed to receive version 10 in March (rumor mill). Hope that helps.

As an update to this post, the Android 10 OS update was installed on my Galaxy phone on March 1.