The Cochrane Reviews are regarded as one of the preeminent collections of systematic reviews in medicine. They conclude that “overall, the reliable evidence available does not support the use of ivermectin for treatment or prevention of COVID‐19 outside of well‐designed randomized trials.”

https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD...

A similar conclusion regarding lack of evidence is discussed in NIH treatment guidelines:

https://www.covid19treatmentguidelines.nih.gov/therapies/ant...

In line with consensus in the field, ivermectin is not contained among the treatment guidelines of any institution at which I have practiced.