ref – https://www.natterandramble.co.uk/present-perfect-continuous-timeline-form-uses/

Present perfect continuous
[have/has] + [been] + (present participle)

The present perfect continuous shows an ongoing action in the present that was started in the past. It is often used to emphasize the length of time.

We have [been] (waiting for over an hour)!

The team has [been] (practicing nonstop for the tournament).