Immigration, Refugees and Citizenship Canada;(IRCC) offers a number of options that allow temporary residents to stay in Canada, even when waiting on a decision for permanent residence, or temporary residence.
For example, maintained status; means temporary residents who apply for a new temporary status do not necessarily have to leave Canada if their documents expire before IRCC makes a decision. Through maintained status, students, visitors, and temporary foreign workers can stay in Canada on the same conditions as their previous permit until they hear back about their new application.
https://www.cicnews.com/2022/03/how-to-extend-your-temporary-status-in-canada-0322957.html#gs.tamxvt