Every request in Wasabi is made through Tor (if enabled)
Currently, the only source for those filters is a specified Bitcoin Node.
So if you have a full node that provides filters, your Wasabi's client can connect to it and fetch them.
In the future we will enable more sources.
My point is how you will reach your Bitcoin node as soon as you are not in your local network? Does this release support onion address for connecting to my Bitcoin Node as a BIP 158 peer?
Wasabi allows you to connect to an RPC interface available on the clearnet. Given the nature of the Bitcoin RPC interface, it is very unusual to see it exposed in the wild; it is much more often accessible only in a local/private network. If you want to connect to a remote Bitcoin RPC hosted in a different network, I would suggest you create an SSH tunnel.
No, Wasabi connects to the RPC interface of your Node, which is not made to be exposed
