RTL Version
To have RTL mode enabled you need to replace the reference of file app.min.css to app-rtl.min.css and bootstrap.min.css to bootstrap-rtl.min.css in the templates/partials/head-css.html.twig file.
And Also Update html tag attribute like <html lang="en" dir="rtl">.
in the templates/partials/main.html.twig file and make sure to
update the public/js/app.js has initSettings()
function which you need to comment out. Because it will set to default the light LTR version.