I applied as Regular TRV .Not under compassionate grounds.I didn't submit any form to PHAC.
Mentioned the reason as family reunification,as it's been almost a year since we have been together ,also I am expecting my first child so I want my mom to be with me during this crucial period.
I am PR holder and my husband is a Canadian citizen.My mom is fully vaccinated with two dosages of Covidshield vaccine.I mentioned these and submitted the necessary docs for proof.
Along with those docs ,I have attached the merged PDF of my 6 months pregnancy report .I didn't get any personalized letter from our gynaecologist or Obstetrician too.
Yes you can raise the webform to prioritize your application.But I am not sure how well it will help you.Because I got a mail from IRCC to raise travel excemption webform , after that only I submitted the webform.But I didn't get any reply for the webform which I have raised.Below is the link to submit the webform for travel excemption
https://secure.cic.gc.ca/ClientContact/en/Crisis
You can give a try.