It may be more helpful to view it in terms of masculine and feminine energy.

You’re right, of course, that individual relationships are nuanced.

It doesn’t really matter if it’s a heterosexual couple, same sex couple, or a non binary couple with no defined gender identity.

Dancing and singing is an embodiment of feminine energy.

Paying the bills and fixing a leaky sink is an embodiment of masculine energy.

No matter how you identify on a gender spectrum you fluctuate between both energies.

This polarity is present in romantic relationships regardless of sexual identity.