Try turning your iPhone sidewaysOn iOS, I can go to Menu, Profile, but no settings. There would have to be a box/button for show signatures. Maybe I’ll see something more on a Kindle or PC?
I have a signature but it has not been on my screen in a very long time, even when I start the thread. Today I can edit my avatar pic, but not the dog or about info. Something is not playing nice with this SE 2020.