Itch has an option to set metadata for your projects (games, assets don't matter what) but it is almost hidden. Sometimes even creators that have much projects don't know how to set it.
You can set what engines and tools you used in project by following the next steps: "Edit game -> Metadata -> Engines & tools"
If your game open-source you also can set it in metadata by following the next steps: "Edit game -> Metadata -> Release info -> License for code". Also you can add the link to the source code: "Edit game -> Metadata -> External links"
If your are making assets under you can add license metadata too "Edit game -> Metadata -> Release info -> License for assets"
The metadata will be visible on your game page if you will click on "More info". Also it will slightly increase your audience because your project will appear on pages of the selected license and used tools and engines.
Additional notice about licenses. Not all people know about metadata so I highly recommend you to write the name of the license somewhere in the description too
P.S If you think that it was useful for you, you can leave a comment here to support my proposal about making metadata more visible for those who are interested in it https://itch.io/t/2919128/metadata-encouragement#post-7952450