Structure a LAMP architecture but with postgreSQL?? AWS Elastic Beanstalk

Good morning, I'm starting out with the AWS Elastic Beanstalk service, I'd like to follow the architecture outlined in the LAMP documentation, however, I want to work with PostgreSQL, not MySQL, it's possible to replace postgres with mysql, I've already done the whole process, but not Connections to rds and ec2 instances work for me