Please add a possibility to show both IPv4 and IPv6 on the Plesk Home page inside the System Overview section, if there is a configured IPv6 address on the server.

Add the possibility to send a notification when a Mailbox is created.

There are already notifications for other actions as creating customer, site, domain, etc.

In case multiple projects on different platforms/for different clients are developed, it would be nice to be able to tag them and have a grouped view of the tagged objects in UI.

Add a possibility to set a type of ModSecurity rule set on a domain level

When trying to open files larger than 10mb on file manager:
Unable to display the file. The file size cannot be greater than 10485760 bytes.

Plesk has a limit of 10mb hardcoded when viewing files on FileManager

On the Domains screen, I would like the Traffic column and the Disk Usage til right-align for easier reading.

Maybe one hint to improve the Plesk GUI: Why don't you integrate a lot more tooltips to give more explanations to the parameters?! Each and every setting should be explained on "mouse over" ...

This tool is great for this: https://github.com/qTip2/qTip2 and provides nicer tooltips than the one I have seen in Plesk so far.

Give administrator permission to restrict ability to enable access to panel for newly created mailboxes and existing mailboxes for customer.
So the checkbox "Access to the Customer Panel" is not going to be visible under customer in Domains > example.com > Email Addresses > Create Email Address or for already created mailbox.

Currently, if forwarder is resolving to another IP address, it is necessary to change the IP address via CLI for the forwarding to function correctly.

Please allow changing the IP address via GUI.

Customers may add their own Buttons for several reasons, eg. Link to the CMS Administration.

Therefore i suggest the possibility to create custom buttons on a per customer base.

Hello,

Please add functionality to see all files caused 404 error in accessing domain.

It is possible to see domain statistics in Domains > example.com > Logs, but there is no global 404 error information.

Web Statistics doesn't show files location.

Possible to change AllowFullYearView into panel

https://awstats.sourceforge.io/docs/awstats_config.html#AllowFullYearView

It would be very helpful to add a new feature in Plesk in order to deny customers to remove some specific folders via FileManager or FTP.

For example:
Currently, any customer can get in website root folder /var/www/vhost/example.com/ > Select all folders > Remove them. This can cause a big problem as it will remove error_docs, logs, httpdocs, GIT keys and other subdomain content.

With this new feature, Plesk administrator will be sure that these folders will not be deleted, however, the customer still will be able to create, modify, content from his folders.

Hello.

Please add functionality when custom themes configured using CLI appear in Plesk > Tools & Settings > Skins and Color Schemes.

Currently it is possible to configure and install custom themes unly using CLI and custome themes don't appear in Skins and Color Schemes.
https://docs.plesk.com/en-US/onyx/administrator-guide/customizing-the-plesk-interface/using-custom-themes/obtaining-a-theme-package-from-plesk.70907/

Add CLI operations to create/manage Scheduled Backup.

So they do not need to be created using Plesk UI.

Disable customer log files from /var/www/example.com/logs from disk space calculation only for one subscription. This could be done, enabling such option in Permissions tab for the affected Service Plan's subscription.

Currently, "Subscription expiration warning" notification is sent per subscription.

The feature to manage notification with all expiring subscriptions would be very useful

When creating a Scheduled Task type "Run a PHP script", an option should be available to use Domain's php.ini file instead of General PHP.ini.

https://localhost:8443/modules/letsencrypt/ is a perfect place to display all domains and emails associated with the certificates and allow to modify them in bulk.

Add in Plesk API possibility to retrieve/get all APS applications installed in a specific domain.