Pulls every active Sync Peer's own support bundle over the network and merges them into one zip -- so you don't have to connect to each node in your fleet one at a time to grab its logs.
This can take up to a couple of minutes: it's a real network round trip to each peer. If a peer can't be reached, its failure is noted in the bundle's peers.json rather than stopping the whole collection -- you'll still get everyone else's.
With no Sync Peers configured, this just produces a bundle for the box you're connected to -- the same thing the plain Support Bundle button does.