I’m assuming the statement ‘Which is probably why it is already there. ctrl-F (while in edit mode).’ applies to the Windows app only? Because it relates to a key stroke native to that OS - and demonstrably doesn’t work on the iOS app.
So is the search and replace function - as noted above a basic staple function for any text-based application - cunningly hidden in the iOS app, please? If so so, why hide it, absent it from the obvious menus or keystrokes?
Surely, such a basic function cant’t have been deliberately omitted from iOS only? If, inexplicably, that is the case, PLEASE prioritise harmonising all functionality across all flavours of your otherwise excellent product. I use the Windows app on occasion, but it’s not available to me currently - and it’s INTENSELY frustrating to find an app one relies on unexpectedly and randomly hobbled on changing platform.