Hi giusti2
You can edit this file administrator ▸ components ▸ com_content ▸ models ▸ forms ▸ article.xml find and change
From:
<field
name="featured"
type="radio"
label="JFEATURED"
description="COM_CONTENT_FIELD_FEATURED_DESC"
class="btn-group btn-group-yesno"
default="0"
>
<option value="1">JYES</option>
<option value="0">JNO</option>
</field>
TO :
<field
name="featured"
type="radio"
label="JFEATURED"
description="COM_CONTENT_FIELD_FEATURED_DESC"
class="btn-group btn-group-yesno"
default="1"
>
<option value="1">JYES</option>
<option value="0">JNO</option>
</field>
In this way each time you add a new article joomla will mark it as featured by default.
Hope it helps