The new U23 player appearance rules have been introduced to improve the performance and strategy of teams, while also providing a clearer understanding of what players can do.

U23 players represent the under-23 category in the FIFA World Cup, which means they are not eligible to play at senior level. This change was made to make it easier for coaches and managers to select suitable players for their squad.

In order to implement these changes, all clubs will need to review their team lists and adjust their training sessions accordingly. The new rule is that each club must have at least one U23 player on its squad by the end of the current season.

This change will give teams more flexibility in selecting players who can contribute to their overall performance, as well as provide them with the opportunity to develop their skills further. Additionally, the introduction of the new rule could help reduce the risk of injuries among young players, as they would be able to compete at a higher level without the added stress of being limited to playing in a lower tier competition.

Overall, the new U23 player appearance rules are a positive step towards improving the performance and strategy of teams, while also ensuring that players have the necessary opportunities to grow and develop. With this in mind, we should continue to monitor progress and ensure that the rules are implemented effectively across all levels of football.