Error: "A slave with the same server_uuid/server_id as this slave has connected to the master"
@Michael-sqlbot hit it on the nail. Following his suggestion I reviewed the documentation @rodrigogs/zongji and sure enough there is an option to set the serverId. Like so:

const instance = new MySQLEvents(DBcon, {
        startAtEnd: true,
        serverId: 1,
        excludedSchemas: {
                mysql: true,
        }
});