Here's the CBC talking why Canadian egg prices have been relatively stable so far (https://www.cbc.ca/news/canada/egg-prices-avian-flu-canada-u...). No mention of vaccines.
Government websites about poultry and HPIA state (...last updated in 2023 >.>) state that we're still doing "stamping out" as opposed to vaccines (though we do have a task force!) https://inspection.canada.ca/en/animal-health/terrestrial-an...