Yes because once you have the base fitted at the time of the toilet install the flapper is just clip on
I’m guessing yours attaches with glue / sticky pads ?
Fluidmaster already sell one that you can change in under a minute also something isn’t totally universally drop in
https://www.fluidmasteruk.com/products/pro-dual-flush-flapper-valve-1-1-2-flush-outlet/
So what’s your product?
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