Welcome to the forum.
Google fi will work in Canada but it is not available for full time outside of the US
From the terms of service:
Under Google Fi Subscription Information
The Services must be primarily used in the United States and are not intended for extended international use. Further, the Services are designed for use predominantly within our network. If your usage outside our network is excessive, abnormally high, or cause us to incur too much cost, we may, at our option and sole discretion, suspend your Google Fi account, terminate your service, or limit your use of roaming