It's not an insurmountable problem if they don't have compatibility on standards

It'll just take time to reach an agreement both sides can accept and it's in some ways simpler than something like the EU-Mercosur agreement since one "side" is a unified country rather that been two trading bloc's negotiating.

It's fascinating watching the world re-align so quickly (by diplomatic/negotiation standards).

EU signed a free trade agreement with Canada but its never been ratified