Good news for those who want to run their system Wayland only.

Luminance is a simple GTK application to control brightness of displays including external displays supporting DDC/CI

Here's the Github Repo

Changes in version 1.5.0

Resources 1.5 has landed and brings with it monitoring for batteries along with the usual bug fixes and improvements. Enjoy!

🐛 Bug fixes

• If the Processes view was the last opened view and the “Show search fields on launch” setting was enabled, the search bar was not automatically focused
• Graphs in the sidebar were reset when a drive or network interface was added or removed
• App icons were not shown for user-wide installed Flatpaks
• The calculated amount of logical CPUs was wrong for systems with multiple CPU sockets

✨ New features

• Resources can now monitor connected batteries
• CPU usage normalization can now be toggled off
• Total read and write stats for drives

📈 Improvements

• Graph colors have been revamped to avoid low contrast situations and improve consistency within views
• Some keyboard shortcuts were changed to avoid clashes with standard shortcuts
• More stability when performance statistics could not be determined
• Some entries in the settings dialog now have subtitles
• If a drive has no model name, its block device name will now be shown in the titlebar
• Small accessibility improvements

Not mine, but here is the Github repo :