In French we have a similar problem. Currently the most popular form is “citoyen.ne.s” or “citoyen.nes” (besides the good old “citoyens” or “citoyennes et citoyens”), which sometimes gets rendered as a website by some text displayers (e.g. les habitant.es). It’s technically supposed to be a middle dot (citoyen·ne·s) but nobody has that on their keyboard (I literally had to copy-paste it from wikipedia) so people use the point instead. We used to use parentheses like “citoyen(ne)s” but these have vastly be replaced by the dots.