Akkordica Virtual Accordion, Concertina, Bandoneon, Harmonica and Melodica VST, VST3 and Audio Unit Plugins for Windows and macOS (Universal 2: Apple silicon M1/M2/M3 and Intel). Best Accordion VST
Harmonica | Sonivox
Glass Works | Cristal Baschet + Glass Armonica Instrument for Kontakt | Soniccouture
Download Free Harmonica plugin: Harmonica by Samsara Cycle Audio