

They didn’t go into depth at all, don’t believe we even have one with a name, but they talked about seeing federation ships made entirely of ‘holographic containment walls’ in Discovery Season 3. Pretty sure it was when they first arrived at federation headquarters in the future.
There was also that ship in insurrection where it was just one giant holodeck, but still existing inside a regular ship. The concept just hasn’t made it into something that’s broadly popular in the mainstream trek fandom.
They kinda did, they just didn’t go into detail. There were ships that were made entirely of holodeck at the new federation headquarters in discovery season 3ish, we just never got beyond being mentioned briefly and people going ‘Oh, thats cool’.