Just like any webserver, the relays can see the IP. Clients too, if the client is a webserver. And then the 3rd thing that you may be more concerned with is when a client auto-loads a link or image from a note, as those can be more of a targeted attack to collect your IP via you looking at a note or DM.
Yeah, we had that a couple months back, with the guy publishing IPs.
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its not automatic - user interaction needed
google amazon meta anybodyONweb - all COLLECT exit IP - but nobody usually dox them like that without a reason. all relay admin also collect them.