The direct package dependencies can be found in the package information:
$ dpkg --info check-mk-raw-2.1.0p9_0.bullseye_amd64.deb | fgrep Depends:
Depends: debconf (>= 0.5) | debconf-2.0, libcap2-bin, cron, time, traceroute, curl, dialog, dnsutils, graphviz, apache2, libdbi1, libevent-2.1-7, libgd3, libltdl7, libpango1.0-0, libperl5.32, libreadline8, libuuid1, binutils, rpm, php, php-cgi, php-cli, php-gd, php-sqlite3, php-pear, rsync, smbclient, rpcbind, lcab, unzip, xinetd, libfreeradius3, libpcap0.8, libgsf-1-114, libglib2.0-0, cpio, poppler-utils, libffi7, libssl1.1, libpq5, libnl-3-200