Nowadays you can find lots of cheap laser diodes emitting light at wavelengths such as 405, 450, ~640, ≥780 and, since recently, also ~520 nm. But it's really hard to find a laser diode emitting at 590 nm or around that (if they even exist yet). It's moderately easy to find (very expensive) DPSS lasers with sum-frequency generation—but not a diode one.
At the same time it's very easy to find orange LEDs. They have been around for decades: I had a cell phone with orange backlight about 20 years ago. So apparently, making p-n junctions in semiconductors with the necessary band gap has long been possible.
What is then the reason that orange diode lasers are still not common (or don't exist)?