Disclaimer: All names contained in this post have been deliberately made public by the person themself.
Model makers, riggers, musicians, artists, and all others involved in the making of vtuber shows are all carefully credited, since it would obviously be reprehensible not to do so, but the actual performer that portrays the Idol goes entirely uncredited. The performers are all experienced entertainment industry professionals, Hololive does not and has never contracted unproven talent. Most of them have IMDB pages but universally their biggest and most prestigious work is not listed there, because Hololive forbids it.
When Rebecca Cardenas went independent as Dooby one of the very first things she did was make her identity public specifically to take credit for some previous work she’s done. But even after going independent she is still seemingly contractually prohibited from taking credit for portraying Ame, something that might actually be illegal in my opinion. Rebecca should be able to list her time portraying Amelia Watson as part of her professional work experience.
I am not saying that all the talent should be forced to make their identities public, rather I think they should be credited by a name which they control. For example, the performer portraying Takanashi Kiara does not own that name and could not use that name when doing other work, but she does own the name Keekihime. So while some talent, like Karen Calanni playing Mori Calliope, would want to be credited by their real name, others, like Keekihime, might rather be credited by a stage name. The important part being that they control the name themselves and can use it as they wish.
Hololive refusing to credit the performers unfairly shackles them to the company and inhibits their professional careers, and that’s messed up
I know in Calli/Dice’s case she’s gone on record previously saying she doesn’t care if people see her face / know who she is. Despite that, she still doesn’t go around mentioning the link explicitly under either alias (as far as I’m aware, at least), and still wanted to keep the two separated even when talking as Dice. Whether that’s just for the sake of the stream not being disrupted, just for the viewer’s sake (kayfabe / compartmentalization), or a weak anti-harassment / anti-“anti” thing, or something else entirely I don’t know.
Given how blasé Ame/Dooby (not just calling her Ame will take some getting used to lol) was about dropping the info about her past professional experience etc, it may be that she doesn’t really care if people know but still wants to keep some element of separation nonetheless like Calli/Dice seems to. And if that’s the case it seems like it’s okay to mention it selectively if it’s relevant - it would be difficult to discuss this topic fully without being able to refer to each talent’s other work outside of holo.