This does not appear to match the evidence anymore: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7717216/

The body is generally unable to raise the core temperature to the point where it can cause permanent damage, unless the ambient temperature is high. That is, unless there is a pre-existing heart or other vital organ condition.

In fact, fevers >=39C (102.2F) showed better outcomes in covid patients.