Man pages matching name otp in section 1:

otp.1.en	debian 10 / heimdal-clients
otp.1.en	debian 10 / otp
otp.1.en	debian 11 / heimdal-clients
otp.1.en	debian 11 / otp
otp.1.en	debian 12 / heimdal-clients
otp.1.en	debian 12 / otp