Ours I submitted photos of bank and credit cards, photos of all my Canadian cards from Tim Hortons, Safeway, Save on Foods, etc. that showed I planned to return as I kept them while living out of the country. Canadian bank account information showing money in the bank. Written letter from my mom saying we can stay with her while we look for jobs. We also submitted screenshots of discussions with friends I had about us moving back to Canada on Facebook messenger as well as emails supporting this with family members. I think that was mostly it. Oh and a personal statement from myself and principal applicant indicating how excited we were to settle down in Canada and have kids as well as how qualified professionals we were indicating we should be able to find jobs in our fields.
We didn’t do this but I know other people supplied search history for apartments/houses in Canada, search history for jobs in Canada, evidence of expression of interest in jobs in Canada, actual job offers, resignation letters from current jobs saying they will be leaving once PA permanent residence approved, etc.