Hello Derrick9,
Welcome to the community!
As far as I am aware, Fido does offer some plans with Canada/US calling. However, it was only available to customers in Québec. In fact, it is still on the Québec plan offerings (available for new activations only). Apparently, the offer might have been extended to customers with an Ottawa area code (see here). According to that article, you would require a hardware upgrade since you already have Fido services. If that is the case, it would not be on the Ontario plan offerings as it does not extend to all of the Province.
I understand some providers might also offer those plans outside of Québec and Ottawa. At this time, however, if you don't live in Québec or the Ottawa region, you unfortunately won't be able to avail of those plans. If you do require Unlimited US calling, Fido does offer an add-on (see here).
It's possible Fido may have plans to introduce some other feature or service which could replace the Fido Xtra program. However, that would be entirely speculation. Unfortunately, no one here would know about future plan features. Even if there were individuals who are privy to that information, they would not be able to discuss such matters until they are officially announced. Any new offerings would be made public on Fido.ca.
Hope this helps 😀
Cheers
