I know that at least some VST hosts will allow VST3s to be run inside a VST host.
IIRC Musocity often suggests Kushview Element, which is free and OpenSource.
There are commercial hosts too, of course.


Jazz relative beginner, starting at a much older age than was helpful.
AVL:MXE Linux; Windows 11
BIAB2025 Audiophile, a bunch of other software.
Kawai MP6, Ui24R, Focusrite Saffire Pro40 and Scarletts
.