Not that it applies to most of us.
https://www.randa.org/en/news/2021/10/new-rule-option-for-club-length
"The R&A and the USGA have announced that a new Model Local Rule (MLR G-10) will be available beginning on 1 January 2022 to provide those running professional or elite amateur golf competitions with the option of limiting the maximum length of a golf club (excluding putters) to 46 inches. "
https://www.randa.org/en/news/2021/10/new-rule-option-for-club-length
"The R&A and the USGA have announced that a new Model Local Rule (MLR G-10) will be available beginning on 1 January 2022 to provide those running professional or elite amateur golf competitions with the option of limiting the maximum length of a golf club (excluding putters) to 46 inches. "