First of all, I would read this thread. I think it will help.
There’s this weird thing where you’ll probably know and doubt at the exact same time. A long time ago now (longer than I really care to admit) I locked eyes with my own twin and I was sure. Absolutely certain. Until five minutes later when I questioned if I was just losing my mind.
Doubt is part of the journey. It’s good to doubt. Otherwise, you wind up with a karmic, and you get stuck there.
Doubt leads to questioning. To searching. To learning. It leads to growth.
Yes, there are twin flame tests like this, but even the makers of that will tell you that they’re to help guide you at best. Most people on the path don’t believe anyone else can confirm it for you. We can help but nobody else is going to be able to tell you 100%. Even TF readings are the same. They can help, they can’t give you a simple yes or no.
And that’s okay. It’s the way it needs to be.
If this is your twin flame and you really are on the journey, certainty will come later on.