An IoT company with globally deployed hardware sensor modules sends temperature, humidity, pressure, and location data via the MQTT protocol to on-premises MQTT brokers running on Linux servers behind a load balancer. The sensor modules are hardcoded with public IP addresses to connect to the brokers. Due to global expansion, the current solution faces scalability issues and increased latency. The company plans to migrate its infrastructure to AWS without reconfiguring the deployed sensor modules and aims to minimize latency. After migrating the MQTT brokers to Amazon EC2 instances, what steps should the company take next to fulfill these requirements?