Of course there is, but the Laffer Curve is so simplistic.
Our tax system doesn't raise as much from middle earners as that of other comparable countries, but our spend on public services is low compared to them too. Given the state of infrastructure and public services in the UK, I don't think middle earners are stupid enough to think that a significant reduction in e.g. income tax wouldn't lead to even more difficulty in accessing a GP appointment or even more holes in the roads.
And a tax cut in the current economy might unleash more inflation.
We need growth but as a pp pointed out, our borrowing costs have crept up.
We're going to be sighing over Truss and Kwarteng for a lot longer yet, I think.