Temperature ranges?
Cpu package(hottest core at any time) is being shown in the screenshot, but we can't see what all the cores are doing.
Can't rely on those motherboard sensors, because they're not very detailed.
Has my CPU been throttled at all?
You need to monitor the cpu's cores in real time in order to answer that. Either HWINFO or Afterburner will let you do that, though the latter may be a little less tedious to do.
For HWINFO, click on that right arrow next to Core Clocks. Double click on all the P-cores to make a real-time graph pop up.
For Afterburner, go to its settings, then the monitoring tab. Scroll down and click on the check next to all the P-cores, then click apply. Detach the monitoring window.
Finally, play game(s) for a bit, then back out and check the core clocks. Are any P-cores dropping below 1.2ghz?
The turbo is impacted by the cpu temperature.
Not just that, but the condition of the board's VRM also impacts turbo boost. If it gets too hot, or the cpu draws more than it's designed to handle, it's going to throttle the cpu.