Phpmyadmin installations are of two types that is server specific and domain specific.
Inorder to install phpmyadmin for the server Download phpmyadmin from
https://www.phpmyadmin.net/home_page/downloads.php
Download it in root of the server.
Unzip the file.
Run the installer.
Once the installer is run you need to update the login and password and the link via which you will access it in the config.php file in the phpmyadmin folder.
Now if this is server specific the link in config.php will contain server IP.
If it is domain specific you need to download phpmyadmin in the root folder of the domain and untar it and in config file mention the link as
https://domain.com
Once done
For serverwide you can access it at
https://serverIP/phpmyadmin
And for domain specific you can access it at
https://domain.com/phpmyadmin