The Government of Canada updated their guidelines on face coverings on April 22, 2022:
Well-designed and well-fitting masks or face coverings can prevent the spread of your infectious respiratory droplets. They may also help protect you from the infectious respiratory droplets of others.
How well a mask or face covering works depends on the materials used, how the mask is made, and most importantly, how well it fits.
Wearing a face covering is not a replacement for other preventative measures, such as vaccination and physical distancing.