Rendering is one app that can load all processing threads.
That is going to generate heat.
Unfortunately, laptop coolers need to be small and light, hence not so effective.
See that your cooling airways are clear, and that the fan is running.
Past that, not much can really be done.
Some will use a laptop cooling pad to give added airflow for cooling.
I would imagine that if you see 90c. ryzen will throttle.
It is certainly easy to try setting the max cpu to 99% and see if it helps.