>>308683000
They support their own own hand tracking thing that doesn't use controllers, but I don't know if you can use it through Link or how usable that'd be for VRChat if you could.
You can definitely run a hybrid setup with Vive pucks for FBT, and I guess you could run Index controllers with that too, but I'd just go for an Index if you really want the controllers that badly. A Quest 2 with the accessories you're going to want, plus base stations and controllers would put you pretty close to Index money.
As much as I like the Index controllers [spoiler]when VRChat's implementation isn't bothering me[/spoiler], I don't think using Touch controllers would really gimp the experience like having to use a touchpad for gestures did.