I came across Vital Synth today and just beginning to explore for creating Custom Patches/Instruments.
https://vital.audio/
Found that it is supporting Custom Tuning Via Scala Files.
I am currently playing with it in Standalone Mode and Will also use it as a VST with Band labs.
Putting this out here, just in case there are other Users who are far ahead of me in terms of Usage and Knowledge.
Thanks Sri.