jnross/Bluetility is an open source project licensed under MIT License which is an OSI approved license.
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A reverse-engineered Bose Connect imitation program for Linux.
Show HN: I reverse engineered the Bose iOS app and rebuilt it for Mac
news.ycombinator.com | 2021-05-04
I don't take quite the same bearish view on this app.
I suspect the "reverse engineering" here was just looking at Bluetooth LE GATT attributes and values, which you can just look at using something like Bluetility . There appears to be some exemptions to DMCA for compatibility so long as the author didn't copy Bose' code, but IANAL. 
The name I think is the more challenging part because it's very close - probably a C&D if it becomes popular to change the name.