I get that social networks force this type of publishing, but I don’t get why anyone really wants to do it. If you write more than a paragraph publish it on a web page then share a link.
BTW, I wrote this post using Drafts on my iPad Mini, which I still think is the best tool for sharing links on micro.blog. To create a link like the one above I first copy it to the clip board, select the text of it in my post and press the Link button above the keyboard. The correct markdown syntax and the URL are correctly placed.