Some of us TIAA folks also have Vanguard accounts.
Here's a link to a lengthy pdf re 2020 distributions into November. (My apologies if this has been posted elsewhere at M*.)
That is an amazingly long list of funds! Vanguard seems to have the problem that many of its investors also have--too many funds.
I believe nothing I am going to write here is news to you, John. For the record... Vanguard is the second largest mutual fund company after BlackRock. For a company, having many mutual funds is not the same thing as an individual. It is catering to customer needs/demands. It has pride in its extensive set of low-cost index funds. Also, if a fund does not attract enough money, the company can consolidate it into another fund anyway.
By the way, TIAA (-CREF) was a simpler entity once.
In part, the list looks long because it provides dates for every month in which a distribution was or is to be made in 2020, January through November, and in part because there are different classes of funds - Investor, Admiral, Institutional.
(I thought it was kind of short, once those desiderata are taken into consideration.)