(kinda surprising that i found 0 threads about this considering how much people love to complain around other sites that use IGDB data regarding this matter...)
Title is kinda self-explanatory. I don't know how many games in total are available on IGDB under the 'digb' tag but are unable to be retrieved via the API (from my understanding this is the current situation, please feel free to correct me if this is wrong). This tag is not available to navigate either, so it is impossible to check exactly how many games are affected, but this still seems like a lil waste. Some of these titles also have some historical relevance that might make them worth to be scraped from the database.
I do get the seriousness of the themes included in the content policy, but since the games are already on the database it might be interesting to have at least an optional setting or filter within the API to allow them to be retrieved. Of course this option would be turned off by default under an ideal scenario. This possibility would also align with statements from the Content Policy that mention the "public interest in keeping a record of the game", which could be also translated in an interest to retrieve data from it, i guess.
To be fair, I'm not 100% sure about how to work with an API (or if this setting/filter/option would even be possible), or what's the definite stance of Twitch regarding this matter, so sorry if any of those points have already been addressed in the past.