GCE cannot access private SQL - google-cloud-platform

Question

I tried to access from GCE instance to Cloud SQL instance, which is private and having private service connection.
following private services access docs, I setup VPC and FW, and create SQL and GCE in same VPC.
https://cloud.google.com/vpc/docs/configure-private-services-access
but in GCE, ping to SQL instance, nor sql connection didn't work.
create VPC
gcloud compute networks create test-custom-vpc --subnet-mode=custom --bgp-routing-mode=global --mtu=1460
create subnet
gcloud compute networks subnets create vpc-sb-1 --network=test-custom-vpc --range=10.100.0.0/16 --region=asia-northeast1
create IP range for private service connection
gcloud compute addresses create vpc-peering-range --global --purpose=VPC_PEERING
--addresses=192.168.0.0 --prefix-length=16 --description=description --network=test-custom-vpc
create VPC peering for SQL
gcloud services vpc-peerings connect --service=servicenetworking.googleapis.com --ranges=vpc-peering-range --network=test-custom-vpc --project=my-project
create mySQL in VPC
gcloud --project=my-project beta sql instances create vpc-sql-1 --network=test-custom-vpc --no-assign-ip
create GCE instance in VPC
gcloud compute instances create vm-in-sb-1 --subnet vpc-sb-1 --zone asia-northeast1-b
create FW rule, so far allow all IP/protocol
gcloud compute firewall-rules create allow-all --network test-custom-vpc --direction ingress --action allow --rules all
Then, I would access VM with ssh and check connection between VM & SQL
gcloud sql instances list
NAME DATABASE_VERSION LOCATION TIER PRIMARY_ADDRESS PRIVATE_ADDRESS STATUS
vpc-sql-1 MYSQL_5_7 us-central1-b db-n1-standard-1 - 192.168.0.3 RUNNABLE
-> SQL private IP is 192.168.0.3
ssh login
gcloud beta compute ssh --zone "asia-northeast1-b" "vm-in-sb-1" --project "my-project"
check connection
ping 192.168.0.3
no response
psql -h 192.168.0.3 -U postgres
mysql --host=192.168.0.3 --user=root --password
psql: could not connect to server: Connection timed out
Is the server running on host "192.168.0.3" and accepting
TCP/IP connections on port 5432?
I have no idea what configuration is wrong

Answer 1

I replicated your case, all configuration are working well but please note, using the command below in step #5 will create a Cloud SQL instance for Mysql not for Postgres:
gcloud --project=my-project beta sql instances create vpc-sql-1 --network=test-custom-vpc --no-assign-ip
If you want to create a Cloud SQL instance for Postgres use the command below:
gcloud --project=my-project beta sql instances create vpc-sql-1 --database-version=POSTGRES_12 --cpu=2 --memory=7680MB --network=test-custom-vpc --no-assign-ip
The problem is you are connecting to Cloud SQL for Mysql using Postgres database client. To proper connect use the following example:
for Mysql example:
mysql --host=192.168.0.3 --user=root --password
for Postgres example:
psql -h 192.168.0.3 -U postgres