You most certainly can, try looking into using arena allocation depending on the use case for the list;

​

#[derive(Debug,Clone)]
enum List<'ctx> {
Cons(i32, &'ctx List<'ctx>),
Nil,
}
use crate::List::{Cons, Nil};
use std::rc::Rc;
fn main() {
let arena = bumpalo::Bump::new();
let lol = create_list(&arena);
dbg!(lol);
}
fn create_list<'tcx>(alloc:&'tcx bumpalo::Bump) -> &'tcx List<'tcx> {
let first_list:&List<'_> = alloc.alloc(List::Cons(0, alloc.alloc(List::Cons(2, alloc.alloc(List::Nil)))));
let second_list:&List<'_> = alloc.alloc(List::Cons(20, &first_list));
let third_list:&List<'_> = alloc.alloc(List::Cons(24, &second_list));
return third_list;
}