Samsung already released the update of Android 12 to all S10 Plus devices. Also all other major carriers have released it as well (AT&T, Verizon, etc)
My device is an unlocked Samsung I purchased directly from Samsung. Why have I not received the update even while I try to push it through SETTINGS>SOFTWARE UPDATE >DOWNLOAD & INSTALL
A friend who works for t-mobile told me that t-mobile like to delay the updates to push clients to trade up their devices. If that is true I will be one passed long time customer leaving the network