So while the Giant Soul Sorcerer isn't a "Homebrew" I am using it for a campaign I am in. I had customized it and the spells I usually get for the different branches of Giant. I did add and extra spell for the frost giant that i made Homebrew for it and it isn't suppose to count towards the spells known. It is however only letting me select it vs just having it. It is a 3rd level spell and I have tried a variety of settings for it in the subclass for it to work, but it doesn't show up as the other spells do. Why is this?

Post the URL of the homebrew.

It’s likely a caching issue. Try logging out and back in again, you would be surprised how often that works.

I managed to get it figures out, its showing up now, Thanks you guys!

Happy to help. If I might ask, what fixed it? I like to learn these things.

I am not entirely sure really, I just kept messing around with it until it worked. I constantly removed and reput the spell back into the subclass and it just worked

As long as it worked