So thanks to Lena, Webby thinks she has missing memories - she doesn't, Lena just came from a time further ahead than Webby, but neither of them have realized that.

What would happen if Webby tried to use a shard/wish to "regain" those memories? I'm fine if the answer is "nada, nothing, bupkis" - I have to ask since Webby would at least try once.