Man pages matching name policyd-spf.peruser in section 5:

policyd-spf.peruser.5.en	debian 10 / postfix-policyd-spf-python
policyd-spf.peruser.5.en	debian 11 / postfix-policyd-spf-python
policyd-spf.peruser.5.en	debian 12 / postfix-policyd-spf-python