It matters to ATC though. IFR practice approaches aren’t supposed to interfere with with the flow of IFR or VFR arrivals / departures.
If you’re IMC, you’re just part of the flow. I mean I guess you could have a long conversation about how you want to go wandering all over inside the clouds but from a practical standpoint, answering the question about how the approach will terminate gives the controller the hint that you’re practicing.
If you use that magic practice word and they’re not realizing you’re inside a cloud, then they say “no services provided”, you’re going to have to have a longer conversation about what you’re really doing.
Seems simplest if you’re in the soup to just behave like anyone else other than asking for a missed at the end. Acting like you’re VMC is going to create a whole different problem.
Whole thing is about getting everyone on the same song sheet, in the end. Say whatever you need to say so the person on the other end of the radio gets the idea.
As an aside, in the soup, I’m not too concerned about whether or not I’m bothering someone else’s “flow”. I’m just another IMC pilot at that point. Start picking up ice in that cloud or something else stupid like that, or have some other problem, my “practice” approach is going to turn into a request to land. Might as well just sequence me like anybody else, because even if I said I want to go missed at the bottom, maybe I get forced to change my mind for good reasons in non-VMC weather.
If it’s VMC, I can change my mind without much drama. “Cancel VFR advisories...”.
If it’s truly IMC, I’m flying it like it’s just any other IFR flight, with the only difference being I’m asking for missed approaches, maybe block altitudes for a student, or a request for an area out of the way to maneuver, or chatting with the controller about where they’d like us to hold if someone is “practicing” that...
But in IMC, that’s real. It isn’t really “practice” anymore. That’s all I was sayin’. I would just talk to ‘em. A big hint I’m going to be a pain in the butt asking for things, would be the frequency being so busy I couldn’t talk to ‘em.
“Would like the RNAV 37 (joke...) and the published missed or wherever you need to put us...” is plenty of info in the real soup. I’ll save the “practice” phraseology for VMC where we have a lot more options to terminate the approach.