@Travis and @Chr1sG I think this well describes what you are looking for as well?
You can see in that post a few more examples of the exact same request, which are actually marked “done” but I don’t think they are…
This is also a cornerstone of Notion, although the closed equivalent to “Collections” in Notion is probably a “Linked Database” which doesn’t actually work as well, I think, as in Fibery - for example, there is no automatic relation between a Linked Database and the Page in Notion where you add the Linked Database. But you can do all kinds of filtering, sorting etc. in there that you can’t do in Fibery right now.
I also think colleague @Oshyan is looking for similar functionality with [DONE] Embed Custom Views into Entity View
Cheers!