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Have to have look at mine see how big a hole it has.You need a flush with a button that'll fit through the handle hole.
Fluidmaster do the one below, others available.
https://www.NoLinkingToThis/p/fluidmaster-toilet-flush-valve-conversion-kit/38533
I f it does not look nice will get it in the neck so maybe steer clear of that.You can use a stnd push button fluidmaster and use the riser adapter for the button doesn't look the best but works
Reply to the thread, titled "Ease of changing a lever flush to a button flush" which is posted in DIY Plumbing Advice on Plumbers Forums.
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