Hello! I also recommend you to upload it to OGA (OpenGameArt).
-Who are they?
It is a platform like itch but only for assets and only licensed under one of free-culture licenses. CC-BY is on of the licenses...
They would like to have your assets because they are really quality! ;)
- How will it help you?
They allow links in the description and people that view assets on OGA usually open links to itch to support creator on other platforms... So it can increase count of views on itch and spread your assets between bigger audience.