use this after the article (single post)

We often use the WP Custom Widget Area: https://www.ads-software.com/plugins/wp-custom-widget-area/
Build up a custom widget area and place Same Category Posts widget.
You can generate a shortcode for custom widget areas and place that where you want. Maybe with a Shortcode Block with the Gutenberg editor.

We work also on Blocks also for that Same Category Posts widget.