Gura is dead, this fact is known and kept secret by all the Holomems and staff. The reason everyone is being radio silent about it is because they realize if it were to leak this info to the public chumbuds wouldn't be able to cope with the loss of their oshi, and there'd be mass suicides and pandemonium as a result. "Why hide it if people will find out eventually?" You may ask, this is because Cover is in the midst of making sure nobody will ever find out about her passing. Right now they're scouting out suitable replacements to take over the role of Gura so that this secret is never found out. Remember when Ame said she was chatting with Gura and everything is fine? In reality she was talking with potential Gura replacements and relaying back to Yagoo her thoughts on their ability to fool you all into believing they're the real deal.

Don't believe me? Just wait until her "comeback" stream to spot all the differences from the original Gura and the "new" Gura.