As per the title. I've bought both the Bundle for Racial Justice and Equality (2020) and the Indie bundle for Palestinian Aid (2021). By default, these bundles are hidden to avoid flooding my library, which I'm not too concerned about. However, if I go to the page of a game that is in these bundles (e.g. Celeste from the latter bundle), there is no indication that I own the game. Contrast this with a game from a smaller bundle (e.g. Family from The Detective Bundle), which does say on its page that I own it.
Right now the only way to tell if I own Celeste (or indeed any game that doesn't tell me on its page that I own it) appears to be to use the search function individually in each bundle, which is inconvenient and will only get more inconvenient with each new large bundle that I purchase.
(As a related suggestion, a nice feature to have would be a way to search one's own library, including hidden bundle games.)