Please read this and below also link
"These IRCC employees are NOT on Strike: IRCC employees who occupy managerial or confidential positions excluded from the bargaining unit, working in positions designated as essential while on duty, term employees hired for a period of less than 3 months, working on a casual basis, in a student employment program, or belong to a bargaining unit NOT in a legal strike position.
However, temporary short-term hired employees will continue to work as usual. Temporary short-term employees were hired to clear the backlogs and are not part of any union.
These temporary employees mostly handle the temporary visa applications such as study visa, work visa, and visitor visa.
They are assigned 80 applications per day from different countries for temporary visas.
Permanent residency applications being more complex are handled by permanent employees, so we may see a dent in processing of such applications."
https://www.cicnews.com/2023/04/canadian-immigration-services-to-be-disrupted-as-155000-federal-government-employees-go-on-strike-0434550.html?_ga=2.5276026.892288288.1680940944-874777718.1681759734
