No. Canadian FBA is only for Amazon.ca orders delivered within Canada. US does allow US FBA orders to be delivered to some other countries for orders placed on Amazon.com - not other marketplaces.
To use FBA for any other marketplace, you must have inventory at that marketplace.
The only partial exception is Europe. You could ship inventory to the UK and also fulfill on DE, FR, ES, and IT. The fees are a bit higher (1-2 Euros per item). The problem is you need to use removal orders to avoid keeping inventory (from returns) to avoid needing to deal with sales tax and income tax for each of those countries.
You need to be aware that to use FBA in any other country, you need to register your business in that country, register for import/export, register for sales tax, register for income tax. You will also require a registered agent (as a legal address for legal or government mailings) and should have a bank account in that country for tax payments and refunds.
It is a big deal (as in not simple) to expand your business to another country. I suggest that before you look to do that, you instead expand your product offering and consider new categories. Canada still provides better margins due to less competition. You will find that in the US and Europe that you will see lower margins and if your suppliers are not providing you with better world pricing, your foreign competitors will always be able to sell for lower prices than you can. Most Canadian products are imported from the US, so US sellers will have a better cost advantage than you will get from Canadian suppliers.