Planning to retire abroad requires additional planning. Find out what benefits are available to Canadian expats, tax withholding in Canada and tax planning in your host country. Here are links with tax withholding rates applicable to various countries:
https://www.canada.ca/en/services/benefits/publicpensions/cpp/cpp-international/before-apply.html
https://www.canada.ca/en/services/benefits/publicpensions/cpp/cpp-international/eligibility.html