Man pages matching name ibv_modify_qp_rate_limit in section 3:

ibv_modify_qp_rate_limit.3.en	debian 10 / libibverbs-dev
ibv_modify_qp_rate_limit.3.en	debian 11 / libibverbs-dev
ibv_modify_qp_rate_limit.3.en	debian 12 / libibverbs-dev