@imolathesecond you were looking for an app with all the sessions and when they start the other day. I might have found one that looks good (i only downloaded it so i didn't really used it yet). The only things are that it is only on Google play (i can't find it on Apple store). And it looks like it is setup in french and on the central Europe time zone (and you can't change it somehow). The app is called Calendrier Motorsport 2022.
And you can choose which series (cars and bikes) you want in your calendar and it will give you the date and the time it will take place. Tbh i don't think you really need to speak french to understand the essential infos.