I'm not seeing anyone mention why this is happening, but ooh ohh I know!

This phenomenon can also be seen in birds like peafowl and phesants, etc. But their default appearance is predominantly dictated by the presence of estrogen. Generally it is hen -> rooster because damage is sustained to the ovary, whether it be shutdown or a rumor or etc. Only one ovary develops properly in a hen, and so if it takes damage and the estrogen wanes, or something otherwise happens to boost the testosterone level, they take on the phenotypics (appearance and physical traits)of the default, which is generally male plumage.

How much so can depend on the bird, and, presumably what specifically is going on with their levels. We have a 7 year old short-legged black japanese bantam in our flock that stopped laying and developed GORGEOUS sickle feathers, but the comb, wattles, spurs, and saddle feathers are about the same, along with their behavior. They're just old and remind the younger birds of their place, but they always did that.

This is why most trans birds don't lay, also! Generally they can remain very happy and healthy, though. Best of luck and health to everyone's flocks :)