Under current law, there is an appeal from a refugee protection division hearing to the refugee appeal division. There is no appeal to the refugee appeal division for a pre-removal risk assessment. The most one can do is to apply for what's called judicial review, but you need leave, that is, you need the permission of the court to get judicial review. The court denies it in the vast majority of cases, and there is no stay. You can be deported while you're waiting for that.
On May 14th, 2019. See this statement in context.