Copy'n'paste without a keyboard, now on Android !

I had a software upgrade on my Samsung tablet recently.
Since then I have been able to copy and paste between apps
by using the buttons on my bluetooth mouse, just as I do on Linux.

It sounds like a little thing, but twenty years ago I realized that
this was so important to me that I would switch to Windows
if necessary to retain this functionality.

Writing and editting text on my tablet+keyboard+mouse is still not
as comfortable as on a computer, but it is now pretty close.

The biggest remaining issue is "escape" is "fn" "escape" and I keep
mis-hitting and switching to the google app :-(.