Count me with the people who don't think this has to be seen as a tie-in. It's not licenced. IMDB lists Star Trek TV writers as its writers and Star Trek TV executive producers among its credited producers.
I seem to remember some of the people who hated Discovery tried to argue it wasn't canon on the grounds that it wasn't a TV show, but a streaming show. And that was rightly seen as silly. So... if the people who make the TV shows decide to change a Star Trek TV series into Star Trek without visuals, is that a tie-in, or primary Star Trek on another platform? It's not the same situation as something like the Pocket Captain Sulu tapes from the 1990s.
I seem to remember some of the people who hated Discovery tried to argue it wasn't canon on the grounds that it wasn't a TV show, but a streaming show. And that was rightly seen as silly. So... if the people who make the TV shows decide to change a Star Trek TV series into Star Trek without visuals, is that a tie-in, or primary Star Trek on another platform? It's not the same situation as something like the Pocket Captain Sulu tapes from the 1990s.