I love the AM4 seating on the Noctua heatsinks, with the two spring driven screws. Self levels and floats with the spring tension pushing it down. Makes it nearly impossible to screw it up.
I have a somewhat "aggressive"* pbo2 "overclock" going, and I have never been anywhere near those temperatures**. Maybe pull your heatsink off and verify that the paste spread evenly over the entire CPU.
*:
TDP 185watts
TDC 125amps
EDC 170amps
curve optimizer -10
max boost over ride +200
pbo scaler x10
I have had no issues at all. No crashes, no high temps, nothing.
Just using the generic XMP memory profile for my memory, nothing special
**there was a program that came with my mainboard called "asus cpu-z". Under the bench tab there is an option to stress test the CPU. Using that stress test I end up at 70-71c as reported by "asus AI suite 3". Looks like it loads down all the cores, and the frequency runs about 4450 Mhz during the test with a cpu reported power consumption of 148-154 watts. I also left the Ethereum miner running during the test, so the GPU was a nice hot toaster right underneath the CPU heatsink.
My gut is telling me you did not apply enough paste
.