iptables-translate -I INPUT -j LOG
nft insert rule ip filter INPUT counter log

ip6tables-translate -A FORWARD -p tcp -j LOG --log-level debug
nft add rule ip6 filter FORWARD meta l4proto tcp counter log level debug

ip6tables-translate -A FORWARD -p tcp -j LOG --log-prefix "Checking log"
nft add rule ip6 filter FORWARD meta l4proto tcp counter log prefix \"Checking log\"