Handlebars in v6

Has anyone had success getting handlebars mode to work in v6? Or even just plain handlebars (e.g. on plaintext without underlying/multilanguage support)?

It looks like there’s no official support?

Would my best path forward be v5?

The mixed-language example shows roughly how this support might work, but indeed, no one seems to have published a ready-made Handlebars package yet.