How can I force HTTPS for all images? I'm moving my Drupal 7 website to https but I keep having issues with some images that gets loaded with full path, but with http://. For example the site logo and view images have http:// path. (Inside DB table file_amanged files are all saved with public:// path.) They are all files loaded through the Drupal UI.

How can I force all images to use https?
You need to use a module like Pathologic which will force protocol relative URLs for all assets.

https://www.drupal.org/project/pathologic

The public:// path is a stream wrapper, and has no effect on whether the browser sees http/https or not. Pathologic will fix all of this for you.