Man pages matching name papi_get_overflow_event_index in section 3:

PAPI_get_overflow_event_index.3.en	debian 10 / libpapi-dev
PAPI_get_overflow_event_index.3.en	debian 11 / libpapi-dev
PAPI_get_overflow_event_index.3.en	debian 12 / libpapi-dev