In order to publish your post on several social media networks, you can use a Multiposting feature.
In order to do that, you need to create a post in Editor (or use one of our pre-made templates) and before publishing it, choose social media pages in different networks you need by clicking on the icons of said pages.
Besides, you can choose several social media pages from different pages, when you are using Repost function.
Be advised, you can`t use a Multiposting feature on a scheduled post. Also, posts you want to use a Multiposting feature on do not resize automatically. Different social media pages have different optimal sizes for pictures you post and might not look like a picture on a preview.