Male betta and female betta living next to each other?

I think it should work. The male might even start building a bubble nest. I have some apistos in adjacent tanks and see them try to interact through the glass.

Another trick is to provide a mirror for the male and he will try to attack his relflection, because he thinks it is another male.

I usually use a standard 5.5gal and put a mayo jar in the center. Male on the OS and female on the inside. trade half of each water with the other to trade hormones, they female is ready, the ovipositor is extended almost 1/8in the make should have picked up the scent and started to make is nest, then they can go together till the egglaying is done