Hi @OwMyLeg
Welcome to the forum. It would be helpful to know what your environment is (OS, DAW) but the simple answer for most DAWs is yes. Simply route the midid from the track with Scaler on it to a track with a vsti on it and Scaler will “play” the vsti. I have don ethis in Ableton Live 11, Reaper and Cakewalk.
There is a tutorial for Reaper showing this for Basic Introduction to Multi Out from Scaler to 4 tracks. There is also a thread on routing in Ableton Live: Scaler 2 Ableton Instrument Rack Routing. Note that Ableton Live does not support Multi Out without a an additional effect such as Blue Cat Audio Patchwork, on Plugin Guru Unify (this is a limitation of Ableton).
Hope this helps
Merry Christmas