@timorl You must assume they do (even if the UI doesn't show that), because IIUC poll responses are just messages sent to their ActivityPub inbox.
@robryk Not if all existing software does one thing.
I'm not asking about software that only exists in the "Permutation City" sense. :P
@timorl Surprisingly enough, even honk (if you emit a poll using "send activity" API) will show you responses (they will appear like text posts responding to the poll).
@timorl Also, I'm surprised that there's no UI for unvoting (given that ActivityPub has a generic Undo message).