Both CL and Elisp are arguably more functional than Javascript in several key ways - Immutable data by convention, First-class function from the start (js added this later), powerful higher-order function are more idiomatic, lexical closures, FP culture that goes back decades. JS has caught up in some aspects - arrow functions, array methods, const, libs like Rambda.

I think, Lisp in general is very flexible - you can write imperatively, or you can do more FP; if you need object-orientation - you have it, polymorphic dispatch - sure why not?, etc., etc.

I object to the claim that a Lisp-2 has first-class functions.