Hey, I got a trick to show the theme editor on small screen devices. All you have to do is just run a line of javascript, from the url bar. Type
javascript: (()=> {document.querySelector(".edit_theme_btn").click();})()
DON’T just paste it in the url bar, because the browser might remove the “javascript:” part from it. You can add that again though.
If you want to use it frequently, make a bookmark of that code, and use that.