I'm aware of one, a DF/DA brother of a Witness in my ex's congregation. The service was at the funeral home instead of the Kingdom Hall, but was presided over by an elder. He read the obituary from the newspaper verbatim, then gave the usual Funeral Talk. There was no mention of the death being a suicide, even though that was known via the local gossip channels. Overall it was a very depressing affair, though I am glad I was there to offer sympathy and support to the family.
Edited to add, "What can we do about it?" I have taken (and recommend) the Mental Health First Aid course. It isn't about teaching you to be a counselor, rather it's about how to recognize those in need and encourage them to seek appropriate professional assistance.