How to Add the RSS Widget
In your dashboard, click on Appearance ? Widgets.
Choose the location where you'd like to place the widget on your site.
...
Click either of the + block inserter buttons (see right) to see a list
of all the available blocks and widgets.
SociableKIT
Rss feed widget to your website
Create a new web page or edit your existing web page where you want
the widget to appear.
Open your webpage. You might use a code editor, a rich text editor,
or a code block.
Paste the embed code you copied from SociableKIT earlier.
Save and publish your web page. ...
Done!