Bring back the function to block specific port passing through the router, as described in this article:

https://www.tp-link.com/us/support/faq/158/

https://www.tp-link.com/us/support/faq/561/

(though some similar features like blocking based on keywards might be useless nowadays).

This will make it harder for users to bypass DNS settings on the router. It would be harder to bypass, but still possible. But harder is better for me.

There are also other users requesting/needing this feature (though not over here):

https://community.tp-link.com/en/home/forum/topic/100081

https://community.tp-link.com/en/home/forum/topic/222642

https://www.reddit.com/r/HomeNetworking/comments/rvxj9y/blocking_port_on_ax1800_router/

https://www.reddit.com/r/pihole/comments/wbxt0f/force_redirect_port_53_traffic_on_tp_link_router/

https://www.reddit.com/r/HomeNetworking/comments/ds6el3/am_i_crazy_is_port_blockingaccess_control_not/

https://www.reddit.com/r/HomeNetworking/comments/qf9qnk/how_do_i_block_udp_port_443_on_my_tplink_ax11000/

https://www.reddit.com/r/HomeNetworking/comments/12ru5za/is_it_possible_to_access_the_underlying_linux/