Just for fun, I made a list of all the Lisp implementations I could find in Debian. Here's a URL that shows which are getting built on ARM architectures:
https://buildd.debian.org/status/package.php?p=chicken,clisp,cmucl,elk,gambc,gauche,gcl,goo,guile-2.0,ikarus,librep,lush,mit-scheme,oaklisp,picolisp,racket,sbcl,scheme2c,scheme48,scheme9,scm,scsh-0.6,sigscheme,stalin,tinyscheme,zenlisp&suite=sid I count 12 "Installed" on arm64 out of the 26. The only one I've heard of people asking for is sbcl, which is blocking 4 other packages on arm64. It looks as if porting it would be a fairly major task. Some of these projects seem moribund. Some are probably easy to port as they are interpreters, or translate to C, but watch out for anything that has never worked on a 64-bit architecture (except by using -m32 on amd64, which is cheating).
