Spellcasting Feature no longer working in Homebrew

I’ve made homebrew subclasses in the past using the Spellcasting feature on classes like Monk & Barbarian. I would take the features directly from other 1/3 Casters like the Eldritch Knight or Arcane Trickster and they would work well enough . Now, using the same method, there is no way to prepare or add any spells. I even made direct copies of A.T & E.K but the problem persists. The Arcane Trickster only shows the option to select Mage Hand and nothing else. Hopefully the DnDB team finds a way to address this.. if anyone has any tips or advice it’d be much appreciated