HTMX would work well with jQuery. But Alpine seems to be more popular in the HTMX crowd. I'd say Alpine is a good replacement for jQuery in my conceptual model.
HTMX just means: just send incomplete HTML documents over the wire. (some that is done for a long time, but was always frowned upon by the API-first and SPA movements -- and for good reasons (ugly APIs and architecturally less-compatible with SPAs).