It seems to be a fairly common usage. Perhaps "Responsibility" is less ambiguous but it doesn't have the same connotation of "right to control" that "ownership" has, so isn't perfect either.

Wiktionary:

2. (business) Responsibility for something.

https://en.wiktionary.org/wiki/ownership

Cambridge English Dictionary:

the fact of taking responsibility for an idea or problem

https://dictionary.cambridge.org/dictionary/english/ownershi...