until Okona shows up on Prodigy I’ll remain convinced that Campbell mixed up his Star Treks and was actually talking about his cameo on LDS.
Except he didn't have a cameo on LD. Okona did, but not Campbell. There was no voice acting involved, nor any plotline involving the "lead female character" idolizing Okona and the "lead male character" getting jealous over it.
McMahan said he had to redesign a character in Lower Decks to match their upcoming appearance on Prodigy. Then Okona (said to be in Prodigy) shows up in Lower Decks with an eye patch.