  We propose a new search for a diphoton resonance in the $e^+e^-+\gamma\gamma$
final state at Belle II that improves the expected reach compared to the
$\gamma+\gamma\gamma$ channel in most of the available mass range. For
simplicity we show our results in the simple parameter space of an ALP coupled
solely to Standard Model photons. In addition, we show how an extension of the
forward coverage of Belle II, or another similar experiment at the high
intensity frontier, could improve the reach in our channel. We show that such a
forward extension can be advantageous even with a loss of a factor 100 in
luminosity compared to Belle II.
