I've been hiring and wildly advertising Lisp jobs for around 10 years now in all sorts of domains. Good candidates always come by, but you'd think that sentiments like yours ("hard to find a lot of jobs") would mean that supply is significantly greater than demand. There is enough supply (if your employer doesn't have lots of stipulations like local-only, citizen-only, etc.; unfortunately mine does), but it's still counter-intuitive to me that supply isn't overwhelming.
I find most people who are attracted to the jobs are
1. Long-time lispers who are pretty happy with their life as it is, and would only take the job if it was truly a killer deal (e.g., work a couple hours a week at a FAANG staff-level full-time salary);
2. College students who are fascinated with programming languages and have dabbled in Lisp; and
There are others, but those dominate in numbers.
I've never, not once, got an applicant that said, "I don't know Lisp but I'd love a job with an interesting language."
Not so remarkably, Haskell programmers, Clojure programmers, and others of those ilk rarely apply. I don't know why, but Lisp has a distinctly different philosophy and lacks a solid community like those languages have.
I've sort of come to the conclusion that advertising it as a Lisp job is perhaps not even so beneficial these days. My biggest success honestly has been finding people who are obviously good at programming, showing them Lisp, then seeing them take off in less than a week and fly to new heights.