The Divine Soul Sorcerous Origin from Xanathar's Guide to Everything (page 50) has the class feature Divine Magic at level 1. It allows you to pick a "free" extra spell based on having an "affinity" with the source of your divine power.
In addition, choose an affinity for the source of your divine power: good, evil, law, chaos, or neutrality. You learn an additional spell based on that affinity [...]
This choice also affects later class features, such as Otherworldly Wings (the level 14 subclass feature):
The affinity you chose for your Divine Magic feature determines the appearance of the spectral wings: eagle wings for good or law, bat wings for evil or chaos, and dragonfly wings for neutrality.
Does your character's alignment have any influence over your choice? Can a Chaotic Evil sorcerer choose Law, or can a Lawful Good sorcerer choose Neutrality, etc.?
I'm inclined to assume that they are unrelated given that it doesn't explicitly say that it is restricted by your alignment, but the fact that it uses the terms good, evil, law, chaos, makes me doubt myself. I can also see this terminology encouraging a DM to say that it does influence your choice.