Install GUI and XRDP for AlmaLinux 9

install.sh

#!/bin/bash

dnf update -y
adduser your_username && passwd your_username # create and change password
usermod -aG wheel your_username

dnf groupinstall "Server with GUI" -y

systemctl set-default graphical.target

dnf install epel-release -y

dnf install xrdp -y
systemctl status xrdp
systemctl enable --now xrdp
nano /etc/xrdp/xrdp.ini
# find port= and replace it with port=tcp://:3389 or another port, make sure it is open in firewall
systemctl restart xrdp

firewall-cmd --add-port=3389/tcp --permanent
firewall-cmd --reload