I doubt it. Most likely complying without complying. Then they dont put their monopoly in jeopardy. If people found out they could use any other app to communicate with WhatsApp users, then WhatsApp would have to actually compete on features and not “use it because everybody else does”.

Being able to check off the box of interoperability without actually interoperating with a competitor is just a trick in my eyes. I hope the EU commission sees it that way too. Given how they want to placate the US though and the concessions they have been making, I won’t hold my breath.