Hi,
WPAdverts by default will use page.php or single.php page template for Advert details pages, if you want to use your own template you can create a single-advert.php template file WordPress will automatically use it on Advert details pages (similarly like with any other custom post type), more about creating the single-advert.php file you can find here https://wpadverts.com/documentation/child-themes-and-templates/
Additionally, if you current Advert details page has some sidebar then you can just use a plugin like https://ww.wp.xz.cn/plugins/custom-sidebars/ to set a sidebar for Advert Custom Post Types.
Thanks a lot, Greg! It works now with the custom sidebar plugin!
Great Plugin!!!
Ok, great :).
BTW. If you are finding the plugin useful i would be thankful if you could write a short one or two sentence review here https://ww.wp.xz.cn/support/view/plugin-reviews/wpadverts