How do you stop the toilet flapper from closing too quickly on flushing?

To prevent the toilet flapper from closing too quickly after flushing, you can adjust the chain connected to the flapper. Make sure there’s enough slack in the chain, allowing the flapper to stay open longer. Alternatively, you can add a weighted object to the flapper or replace it with one that has a slower closing mechanism. Additionally, check the flush valve seat for wear, as a worn seat can cause the flapper to malfunction.