It would be great to be able to search by keywords amongst the comments in a post. Right now there is the function to navigate from comment thread to comment thread on a post. I could picture the search can also be triggered by the floating action button similarly.
I don't think I have that Find in Page function. I have an arrow icon for the button at the bottom right for navigating between threads. Then when I trigger it and further press on the three-dot button in the middle, I only get the options in the screenshot shared above.