When building an audience, I do not see a "last active filter" to create an audience.
- Creator Studio | People | Audiences
It should be possible to filter audiences on last active date. However there is no last active user activity filter in the basic audience filter.
If you have access to Classic Studio, the Classic groups query builder can be used. In Creator Studio, the advanced query builder can be used. Example query: "last_active:this_year"
Please check the current status of this issue on the Known Issues Tracker. (Issue ID: CSUP-3525)