Is it safe and private to use Brave configured this way?
IPFS Companion
Public Gateway
Active VPN with split tunneling
In item 6 about IPFS Support in Brave says: “If you are using a system proxy, it’s possible the node will send some requests that than not go through the system proxy.”
Is this claim valid for VPNs recommended?
Is there a chance that my real IP will leak, even if the VPN connection doesn’t fall?
You missed a key part of item 6 there, which is “from your local IPFS node” - if you’re using a public gateway instead of running a local IPFS node like you say, then it doesn’t apply in the first place.
If you do run a local node then it depends on your VPN client. That still shouldn’t be the case if it has a properly firewalled kill switch.