Yes! Head over to https://github.com/benthecarman/mutiny-startos, grab the package’s code, update it, and sideload the s9pk on your StartOS device. Once you’ve tested it, make sure to create a PR so that others can have it as well.
Discussion
that said I see nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qgwwaehxw309ahx7uewd3hkctcqyrsl7wla6njqx9v4nvytflxgy302552xxlsafmp2u9ntwse5r0s67r6ftr9 already updated it - I'll test it out and make it publish soon™
Thanks Mariusz, I'll wait for the update when published. I found the code but couldn't work out how to update it. Would be interested to learn how.
It is already in the BETA Registry:
https://marketplace.start9.com/mutiny-wallet?api=beta-registry.start9.com&name=Beta%20Registry
Hey Mariusz, I managed to add the community beta, but the Start9 beta comes up as an invalid URL, thanks for the help BTW 👍 
just use: https://beta-registry.start9.com/
I got it now, thanks a lot 👍