Man pages matching name smbpasswd in section 8:

smbpasswd.8.zh_CN	debian 10 / manpages-zh
smbpasswd.8.zh_TW	debian 10 / manpages-zh
smbpasswd.8.en	debian 10 / samba-common-bin
smbpasswd.8.zh_CN	debian 11 / manpages-zh
smbpasswd.8.zh_TW	debian 11 / manpages-zh
smbpasswd.8.en	debian 11 / samba-common-bin
smbpasswd.8.zh_CN	debian 12 / manpages-zh
smbpasswd.8.zh_TW	debian 12 / manpages-zh
smbpasswd.8.en	debian 12 / samba-common-bin