will my apple services work seamlessly as i go back and forth between summer in canada and winter in usa?

This article describes how to change your country setting on everything using your Apple ID, and the requirements and results of doing this:

Read how to "Change your Apple ID country or region", click here --> https://support.apple.com/HT201389

https://www.apple.com/legal/internet-services/itunes/us/terms.html

The sections below are copied from the USA Apple Media Services Terms and Conditions document but I suspect they are very similar for all versions of this document --> https://www.apple.com/legal/internet-services/itunes/us/terms.html - Last Updated: September 16, 2020

"Our Services are available for your use in your country of residence (“Home Country”). By creating an account for use of the Services in a particular country or territory you are specifying it as your Home Country."

"Terms found in this Agreement that relate to Services, Content types, features or functionality not available in your Home Country are not applicable to you unless and until they become available to you. To see the Content types available to you in your Home Country, go to the Services or visit https://support.apple.com/en-us/HT204411. Certain Services and Content available to you in your Home Country may not be available to you when traveling outside of your Home Country."