It is a just a recast man. No need to find an explanation. And Idk why your post was taken down.

Recasting needs no explanation. Different actors playing the same role. It is not meant to be complicated.

Sometimes recastings are given an explanation: for example, when the Oracle was recast in The Matrix Revolutions, the Oracle told Neo she had to change her appearance within the Matrix.

I like your thought about this, but it doesn't make any sense to be honest...

@MarvelSharky Does the same go for War Machine?

@JMATIUAS Yes, why wouldn’t it?

Interesting theory for Ross but Cassie is five years older than she was in antman & the wasp.

I mean the casting change from the adult version in Endgame.

Nah

The villain of DAD had a reason for changing his appearance: to infiltrate the society he wanted to destroy. It's just part of the story. There is no in-universe explanation for multiple actual recasts for characters (including Bond himself) in the pre-reboot Bond movies.

Why take a plot from a villain from another movie and apply it to any MCU character that was recast? It would be bizarre so many characters doing that.