In order to have RTL mode enabled, uncomment Light Theme scss files in the src/assets/scss/themes.scss file same as uncomment below 2 line

@import "../scss/config/default/bootstrap.scss";
@import "../scss/config/default/app.scss";

and uncomment RTL Mode scss files in the src/assets/themes.scss file same as uncomment below lines

// @import "../scss/rtl/components-rtl";
// @import "../scss/rtl/layouts-rtl";
// @import "../scss/rtl/plugins-rtl";
// @import "../scss/rtl/pages-rtl";