This is a really interesting issue within the industry. I work within the film and television industry, both in Australia and the UK, and have never been credited for the roles that I do that, some would argue, should be credited for.
But when you break down something like a mega-Hollywood-super-feature-blockbuster-film like Oppenheimer, the amount of ancillary and auxiliary bodies working on a movie like this, would amount to a credit role that would be very hard to keep track of.
For example, do you credit the data wranglers who might be assisting the DIT, or the courier service who delivers dailies to the post house? Or the team of edit assistants who make proxies for OCM? Do you credit every person who was on craft catering for the entire production run?
On one hand, I can see why it is “consolidated” to team leads, or heads of departments, but personally I think that ANYONE who worked on the film SHOULD be credited, as their time is equally as important as everyone else’s.
I have learnt to accept that my name won’t be appearing in any credit role, despite the hours I put in to make sure it happens, and I am okay with that, but totally understand and support anyone who feels like they should get the recognition… as I said at the start… interesting issue.