You can use the MIDI Modifiers to adjust the Velocity while playing the VSTi. but it will record the actual values from your keyboard and adjust the velocity when the MIDI data gets sent to the VSTi.
If you want adjust the velocity as it’s coming in so it gets modified before it gets recorded you can use either the Project or Track Input Transformer.
The Project Input Transformer is global while the Track Input Transformer and MIDI Modifiers work on a Track by Track basis. However you approach it, the best thing to do is integrate it into your Template(s) so you only need to set it up once.