Re: Mockingbird - Neither Laura Barton nor Bobbi Morse has yet been referred to by that codename in the MCU. The only use of "Mockingbird" to describe Bobbi was at a promotional event, and Laura has only been identified as "Agent 19" so far (which Bobbi never has). Of course, it's still very possible (& likely) that the agent number & codename could be handed down (especially the number, since there's no way Laura was the 19th SHIELD agent ever) given Laura has been retired for at least two decades in-universe, there still isn't even any real overlap to justify between those characters.
Re: Mockingbird - Neither Laura Barton nor Bobbi Morse has yet been referred to by that codename in the MCU. The only use of "Mockingbird" to describe Bobbi was at a promotional event, and Laura has only been identified as "Agent 19" so far (which Bobbi never has). Of course, it's still very possible (& likely) that the agent number & codename could be handed down (especially the number, since there's no way Laura was the 19th SHIELD agent ever) given Laura has been retired for at least two decades in-universe, there still isn't even any real overlap to justify between those characters.
Edited by CaptHayfever