I double space but this can occasionally be annoying when double spacing serves another useful function (like in markdown) so I can imagine some people do disab

I double space but this can occasionally be annoying when double spacing serves another useful function (like in markdown) so I can imagine some people do disable the shortcut. In that case (and if the keyboard doesn't show a period on the first page) another method you could use would be to set up your own text replacement macro (ios: settings, general, keyboards, text replacement).