Ahaha you wish. nftables replaces iptables and it has already happened in Debian 11.
nftables adds a new tool, called nft, which replaces all other tools from iptables, arptables and ebtables. From an architectural point of view it also replaces those parts of the kernel that deal with run-time evaluation of the packet filtering rule set.
Read the complete explanation of the why is is happening here: https://developers.redhat.com/blog/2016/10/28/what-comes-after-iptables-its-successor-of-course-nftables