My first time knowing about Transat:

Planning a trip to Rome in the summer of 2023. Via Google Flights, some good prices come up. Results point to the Transat site directly or Expedia. Knowing that its best practices to book direct, I clicked through to Transat, only to find that I can only book up to October 2022. I found this odd, but maybe this is how Transat has always been?

Clicking through to Expedia, the checkout process is there right straight to the final Book Now button. These are for the same summer dates. I did not proceed until I researched further.

Is there something I should know about Transat policies? Thanks for the advice!