Man pages matching name rngd in section 8:

rngd.8.en	debian 10 / rng-tools
rngd.8.en	debian 10 / rng-tools-debian
rngd.8.en	debian 10 / rng-tools5
rngd.8.en	debian 11 / rng-tools-debian
rngd.8.en	debian 11 / rng-tools5
rngd.8.en	debian 12 / rng-tools-debian
rngd.8.en	debian 12 / rng-tools5