That to me sounds external/additional to the idea of a component. You can do the component side on your backend language of choice, and output html like htmx l

That to me sounds external/additional to the idea of a component. You can do the component side on your backend language of choice, and output html like htmx likes it, and it works (have done it in Python, for example). It is extra work, but it works with a bit of programming.