You’re talking about the velocity CV output ( ? )
I will assume you are.
Think about the MIDI Note On message. It has two pieces of data, the note and the velocity. It is immediately active when received. After that both those two pieces of data never change.
So on the NiftyKEYZ with CV, when a note is played, gate goes high, and the Velocity CV represents the velocity of that note. When the next note is played that note’s gate goes high, and the Velocity CV is then the velocity of that note.
All the data is there, for CV, it is just in a different format than on the Keystep Pro.
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An aside – Cre8audio is going to be at Superbooth 2025 with at least two new Eurorack products. One can always hope.