@Inna22,
No, you cannot authorize a gathering of more than 16 people at your listing, and still abide by Airbnb's party policy: https://www.airbnb.com/help/article/2704/party-and-events-policy
In this excerpt from the policy, I bolded and italicized the text that would pertain to you and your listing:
- Parties at single-family homes
Until further notice, gatherings of more than 16 people at single-family homes are not allowed, regardless of host authorization.
We trust hosts in single-family homes to set rules for small gatherings (fewer than 16 people) that are appropriate for their communities and consistent with local health authority restrictions on gatherings.