Man pages matching name smbpasswd in section 5:

smbpasswd.5.zh_CN	debian 10 / manpages-zh
smbpasswd.5.zh_TW	debian 10 / manpages-zh
smbpasswd.5.en	debian 10 / samba-common-bin
smbpasswd.5.zh_CN	debian 11 / manpages-zh
smbpasswd.5.zh_TW	debian 11 / manpages-zh
smbpasswd.5.en	debian 11 / samba-common-bin
smbpasswd.5.zh_CN	debian 12 / manpages-zh
smbpasswd.5.zh_TW	debian 12 / manpages-zh
smbpasswd.5.en	debian 12 / samba-common-bin