Trying to understand how claudflare onion routing principle works

[FranklyFlawless]

No, there are six Tor relays used total. Quoted from the Tor Project page linked earlier:

In general, the complete connection between client and Onion Service consists of 6 relays: 3 of them were picked by the client, with the third being the rendezvous point, and the other 3 were picked by the Onion Service. This provides location hiding to this connection.