The link I posted answers part of your question as follow.
"If you’re applying as a
permanent resident, it takes about three months to process your results after we get them from the panel physician. After that, if we don’t need any other documents from you, we’ll tell you what to do next.".
What is your concern with medical exam anyhow? The only reason why they would fail the exam is on medical inadmissibility grounds: Danger to Public Health, Danger to public safety and excessive demand on health or social services. Even then, it has exception in place not to outright deny based on this.
So, you shouldn't have any uneasy feelings about medical exams. If you want to learn more about medical inadmissibility, this link gives you all the information you need to (hopefully) put your mind at ease.
https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada/inadmissibility/reasons/medical-inadmissibility.html