Don't have a lot of resources but I have been through this sort-of.
When my son was in 7th grade he knew a kid who committed suicide. The kid was one of a group of 9th graders he was playing Minecraft with online. Turned out this teen lived only around the corner but we didn't know that till after he died. The kids in this group all made a memorial for him in their Minecraft world and talked quite a bit about it online to each other. I tried talking about it but he didn't really seems to have much to say at the time. But it was a time my son was already seeing a psychologist so it probably was something they discussed.
