Should you choose to tell Varric this is a mistake or you can do it in Dragon Age The Veilguard?

One of the first big decisions you face in Dragon Age: The Veilguard is whether or not to support Varric’s plan. He’s determined to try and reason with Solas, but it’s up to you whether you want to back him or try and stop him from doing so.

This decision occurs during The End of the Beginning quest as your team tries to stop Solas from completing the ritual. The decision you make has some instant ramifications, so you need to know whether you should choose to tell Varric this is a mistake or you can do it in Dragon Age The Veilguard.