Some low flow models are created so that you just press it to run enough water to down a piss, but hold it to unleash all the stored water to down anything more. That was the point of them, save water by fixing the obvious problem of downing a tank of water over a little urine. But unless you bought the toilet or were told, you don’t know that, and that’s where a lot of the issue comes from. Same interface as any other, different expected input and results.
On the other hand, I once had an old toilet that did require multiple flushes. It was not a low flow, and there was nothing wrong with the toilet. Years of accumulation had restricted the plumbing like 30 feet down. Plumber eventually sorted that out.
Some low flow models are created so that you just press it to run enough water to down a piss, but hold it to unleash all the stored water to down anything more. That was the point of them, save water by fixing the obvious problem of downing a tank of water over a little urine. But unless you bought the toilet or were told, you don’t know that, and that’s where a lot of the issue comes from. Same interface as any other, different expected input and results.
On the other hand, I once had an old toilet that did require multiple flushes. It was not a low flow, and there was nothing wrong with the toilet. Years of accumulation had restricted the plumbing like 30 feet down. Plumber eventually sorted that out.