Related to this, is the CKEditor installed in Metronic not supporting all the toolbars in CKEditor 5, I tried what I needed and it didn't work if I refer to the CKEditor 5 documentation.
and if true means I have to buy a license from CKEditor 5 separately because Metronic only provides a free version.
You will need to use the online builder and download your custom package via Ckeditor Builder and place the source files under
core/html/src/plugins/ckeditor-custom folder and include the custom Ckeditor build assets in the assets build via
tools/gulp.config.js and add
plugins/custom/ckeditor/ckeditor-custom.bundle.jsfrom the assets folder into your pages to use this custom ckeditor editor in your pages.