In two minds about this. Yes for those who find themselves on benefits after having more than two children (job loss, divorce etc) but perhaps not for those who choose to have more than two children when they have never worked (disabled families excepted).
https://www.theguardian.com/society/article/2024/jul/11/uk-two-child-benefit-cap-affected-1-6-million-children-last-year-figures-show