Which of my games show up in Google Calendar?

Only games you really take part in. As a player you must be in the main lineup; the waitlist does not count. A cash sign-up counts right away, a card, Apple Pay or Google Pay sign-up appears once the payment is confirmed. In team games your team must be confirmed, in league matches you must be in the matchday squad, and a challenge game appears only after the challenge is accepted. As the organizer or creator you get your games, including every match of your league; a league match without a date appears as soon as it gets one. Referees and managers assigned to a game get it too.

If you have several roles in one game you still get one event, named by your main role: host first, then referee, then player. Past games and the training game are not added. Games you leave and cancelled games are removed automatically.

If a game is missing, check that you are in the main lineup and not the waitlist, and that the switch for your role is on in Settings → Connected Apps → Google Calendar.