To protect hidden text, always use and flatten/save as JPEG . To recover text, try:
Android users often find success using free apps like Google Snapseed or PicsArt. unhide painted screenshot text
If you’ve received or taken a screenshot where sensitive text has been painted over (using MS Paint, markup tools, or basic drawing features), you might wonder if that text can be recovered. The short answer: To protect hidden text, always use and flatten/save as JPEG
Here's a step-by-step guide to unhiding painted screen text: To protect hidden text