That's a big negative there. The thunderbolt users the miniDP for signaling but they are not compatible with one another. Thus a miniDP will not drive a thunderbolt interface. If you plug in a miniDP cable in, the mac will drive it like any other display, but you won't have the thunderbolt features. You have to plug in the thunderbolt cable to get the advanced features.
Think of Thunderbolt like USB4; you can plug in more then just displays. It is very high speed with enough bandwidth to drive a display, hard drives, and other things all at once. The DP can only drive a display.