Here are the steps on how to install GUI Desktop on AWS EC2 Ubuntu Server 22.04 LTS Jammy Jellyfish and 20.4 LTS.
You can connect via vncviewer or xrdp using a remote desktop.

sudo apt update
sudo apt upgrade -y
sudo apt install tasksel
tasksel --list-tasks
tasksel

#NOTE: if you don't want to use the desktop environment in tasksel, you can install other versions like below.
#Lubuntu-desktop
sudo apt-get install lubuntu-desktop
#ubuntu-desktop
sudo apt-get install ubuntu-desktop
#Lubuntu-desktop
sudo apt-get install xubuntu-desktop


sudo apt install slim
sudo apt install tigervnc-standalone-server

#Start up vnc session for vn viewer
vncserver -localhost no

#download tigervnc viewer
https://tigervnc.org/
https://github.com/TigerVNC/tigervnc/releases

#install the xrdp Griffon script
https://c-nergy.be/blog/?p=18725


In this channel, I"m documenting and sharing what I do in my fields as an IT professional. Documenting things I worked with and hoped it would help you.

I appreciate your support.
Please SUBSCRIBE.