I'm homebrewing a subclass for a character and I've run into an issue with spells

There are two spells that she couldn't cast before and I want her to be able to cast now, but only as rituals. I tried adding that as a feature, but when I did that it made her choose a spell and didn't let her have both of them. I tried putting them into an expanded spell list, but I couldn't specify there that they could only be cast as rituals. Is there a way to get access to both of them?

Yes, do what you did the first time but add each spell individually instead of both together.