I tried it today, it mostly works, thanks!
opam install ocaml-lsp-server also works, but when I format a file in vscode, I got an error:
ocamlformat: option `--profile': invalid value `'conventional'', expected one
of `conventional', `default', `compact', `sparse', `ocamlformat'
or `janestreet'
Usage: ocamlformat [OPTION]... [SRC]...
Try `ocamlformat --help' for more information.
The other feedback is that it took too long, almost 3 hours to have it installed. It is hard to convince people to give it a try unless he/she is already sold on ocaml.