Why don't I get en event with binlog information when I create a snapshot?

I want to take a snapshot of an RDS (MySQL) database in order to start a replication slave. According to https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Replication.MySQL.html, I first need to take a snapshot, which should then generate an event showing the binlog position. I have taken the snapshot, but there's no event anywhere - is there something else I need to do - activate something, change an option, ...?