How to get the unnormalized linear velocity?

So when I get my linear velocity vector, the values are normalized. I need them non-normalized. How should I go about getting it?

I basically want to set a specific max speed limit, so this way if the linear vel is bigger than x, I won’t increase it. If there’s another way to do it, please tell me.

There is no such thing as “normalized velocity.” There is a “normalized direction of movement vector.”
What makes you think that the physics get velocity node returns a normalized velocity value?
Note that a vector is linear – perhaps what you’re asking for is the scalar (single dimension) velocity? If so, use the length function on the velocity vector; that’s your scalar velocity.