All matches on Grands are public, meaning anyone can find and view them. However, you can control who gets to join by setting a join restriction to Approval required when creating your match.
When this restriction is enabled, players must send a join request instead of signing up directly. As the organiser, you can review each request and either approve or decline it.
If you approve a request, the player will receive a push notification and/or email letting them know. Approval doesn’t automatically add them to the match, and they’ll still need to join the match themselves to secure their spot.