GCP SQL PostgreSQL Read-Replica Problems

[eb-trigo]

Hi,

I'd like to know if it's possible to understand using Python and tfplan if a specific GCP SQL resource has changed?

Name of the Terraform resource:
resource "google_sql_database_instance" "read_replica"

Python command:
terraform.plan(out = "tfplan", compact_warnings = IsFlagged, no_color = IsNotFlagged, capture_output = False)

My problem is when I try to upgrade the GCP PostgreSQL tier it first of all increase the master instance and only then the read-reaplica instance which cause this ERROR:

master cannot be larger than read replicas

Any ideas on how I can update the read-replica SQL PostgreSQL instance first if there are any changes (tier, max_connections, etc..)?