No sidebar on posts page?

Hi,

What do you mean? There is a sidebar displayed on posts: https://themedemos.webmandesign.eu/auberge/recipe-post-sample/

If you mean the blog page (https://themedemos.webmandesign.eu/auberge/blog/), please note that this theme was designed with no sidebar on the page.

As for your custom theme modifications (add a sidebar to blog page), please note that I do not provide support for those https://support.webmandesign.eu/support-policy-and-terms-of-service/

Tip: You need to use custom responsive CSS to display your sidebar on mobile correctly. https://www.w3schools.com/css/css_responsive_intro.asp

BTW, this question was already answered on theme support forum https://support.webmandesign.eu/forums/topic/sidebar-on-blog-page/

Regards,

Oliver