Yeah that took me by surprise too when I learned that couldn't sign a message proving ownership of a multisig address.
Bitcoin talk forum explaining that it is impossible (in 2016).
https://bitcointalk.org/index.php?topic=1576803.0
Then more recently (2021) Craig raw explaining why it is currently not a feature.
https://github.com/sparrowwallet/sparrow/issues/193#issuecomment-1117139854
Evan
npub16q…0cy8w
2024-04-08 16:46:51
in reply to nevent1q…5cvr
Author Public Key
npub16qcdx0pjnatt5l7k4aryl9jzrf8lc55cuzkr3c9zfvncc5vsunssr0cy8wPublished at
2024-04-08 16:46:51Event JSON
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