@incomera,
Again we see the issue, but this is not the wpDiscuz issue. It comes either from the plugins or theme. On your website, the font awesome lib isn't loaded.
Please watch this video: https://app.screencast.com/JokDJczahPMWr
If the "Load Font Awesome css lib" option is enabled, you should see the your-domain/wp-content/plugins/wpdiscuz/assets/third-party/font-awesome-5.13.0/css/fa.min.css?ver=7.6.1' file.
On your website, it's now missing at all.