Its a "thin" laptop with a "high-end" CPU and enthusiast GPU, if everything is correct in terms of configuration then it is probably throttling down due to heat.
Some things you can do that could help with temperature:
1.Raise the laptop or get a decent cooling pad that runs off it's own power(IET GT series)
2.I see you are using throttlestop so you can try and have a play with undervolting and reducing the multiplier down from its max multiplier of 56x to somewhere you are comfortable with
3. Alternatively you can turn off "turbo-boost" entirely doing something like this:
4.Return the laptop and replace it with a laptop with better cooling solution and combine step 1&2 for consistent performance for both CPU and GPU
For the longevity of a laptop to maintain its performance is keeping the temps in control.
I have 13900HK + 4080 in my Alienware X16, with a cap of 35x multiplier using intel XTU and power limit cap at 100w, I am getting 100+ fps on WZ2 running on my external monitor with temps averaging 75c on CPU and 65-70c on GPU on my cooling pad.
The laptop is only for personal/gaming use so I am not too fussed with a bit of perf dip on the CPU end.