Tholians in Lower Decks (I think spoilers but idk)

In the Lower Decks Cave Stories episode, I remember there being a part where Boimler and Levy were going to get Tholian Eggs implanted in their throat, but they ended up not getting it because Levy knew about them. Earlier today, I was looking around Memory Alpha, (Basically the Star Trek Wiki) and I looked into the Tholian page. I checked appearance, and it never mentioned any Lower Decks episodes. So I wanna now, is it just not there or was it not Tholians in the episode? Thanks.