The posts you’re seeing about passionate love stories are what twin flames are ultimately meant for. There is a great post about the true purpose of twin flames, but all of that comes with a very intense love which is the furthest thing from platonic as you can get. I do agree with @Tighthair that if you suspect this is a platonic connection and it’s not ‘normal’ then it is most likely a soulmate, not a TF.
Some will validate platonic twin flames because it’s comforting and inclusive, and I get that. But the deeper teaching is that twin flames carry a romantic blueprint. You might not get there this lifetime, that’s real, some pairs don’t. But the design is lovers, not friends. You may start as friends but inevitably, it will become romantic because twin flames are designed to be together for eternity.
What you’re describing sounds like a phase, honestly. The “I just want to be there for them” without romantic wanting? That’s often what separation feels like when you’re trying to protect yourself from the intensity. Or when there are circumstances blocking union like existing relationships, distance or fear.
The soul recognition is there. The pull is there. The romantic piece isn’t absent, it might just be buried or blocked right now.
I know that’s maybe not what you wanted to hear. But I’ve seen too many people settle into “we’re just platonic” as a way to avoid the harder work of actually pursuing union. And then years later they’re still crying over what could have been.