Docker stack deploy on GCP cannot access the webpage - docker

Question

I'm trying to use docker swarm and docker stack to deploy my docker-compose file and after I've deployed my stack successfully, I can't access the web page. It just says the response time is too long with the error message "ERR_CONNECTION_TIMED_OUT" I have also opened the TCP and UDP ports 7946, and 4789 as well. Does anyone know what went wrong?
Here's my docker-compose file:
version: "3.3"
services:
mysql:
image: mariadb:latest
environment:
MYSQL_ROOT_PASSWORD: dbRoot
MYSQL_DATABASE: cloud
MYSQL_USER: php
MYSQL_PASSWORD: php
networks:
- mynet
myphp:
image: php:7.4-apache
depends_on:
- mysql
ports:
- "9000:9000"
volumes:
- ./src:/var/www/html
deploy:
placement:
constraints:
- node.role == manager
networks:
- mynet
mynginx:
image: nginx:latest
depends_on:
- myphp
ports:
- "80:80"
deploy:
mode: replicated
replicas: 2
placement:
constraints:
- node.role == manager
networks:
- mynet
visualizer:
image: dockersamples/visualizer:latest
ports:
- "8080:80"
volumes:
- "/var/run/docker.sock:/var/run/docker.sock"
deploy:
placement:
constraints: [node.role == manager]
phpMyAdmin:
image: phpmyadmin
environment:
PMA_HOST: mysql
ports:
- "8082:80"
networks:
- mynet
volumes:
src:
networks:
mynet:
driver: overlay
ID NAME MODE REPLICAS IMAGE PORTS
9ef6kj1wois8 test_mysql replicated 1/1 mariadb:latest
jjcmp9lrr35f test_mynginx replicated 2/2 nginx:latest *:80->80/tcp
oogi9emcjo0j test_myphp replicated 1/1 php:7.4-apache *:9000->9000/tcp
re8wnkvcxgo2 test_visualizer replicated 0/1 dockersamples/visualizer:latest *:8080->80/tcp
y9i19mxjp69q test_phpMyAdmin replicated 1/1 phpmyadmin:latest *:8082->80/tcp
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
c7b6bv6qgqbn test_visualizer.1 dockersamples/visualizer:latest manager Running Starting 11 seconds ago
xu9cvjjp4xqt test_mynginx.1 nginx:latest manager Running Running 10 seconds ago
klf8nimlljbp test_myphp.1 php:7.4-apache manager Running Running 10 seconds ago
0epkhwsmub8c test_mysql.1 mariadb:latest w1 Running Running 14 seconds ago
zlluox3ga6fw test_phpMyAdmin.1 phpmyadmin:latest manager Running Running 12 seconds ago
knmvjwmcslsj test_mynginx.2 nginx:latest manager Running Running 10 seconds ago