[efreak]

The paste action gives you feedback by having the cursor move to the end of the selected text after it replaces the text you copied with itself.

If you're on Android, lately it actually does give feedback by putting the copied text into the predictive text/autocomplete bar above the keyboard (I find this annoying as I'm usually copying text to save for later use, and I use the appearance of text I want in the corrections as an indication I've swiped wrong. If only I could touch-type while lying down...). In other apps that don't display the keyboard, it sometimes gives you a toast that an app has access the clipboard, though it gives the same toast for pasting or just for accessing it (eg pasting with termux or using an RDP app that syncs the clipboard)

[croes]

That’s too late, if copy didn’t work or I copied the wrong part I have to go all the way back and select the part to copy again.

That’s why Ctrl-X, Ctrl-Z is the way