Here’s a recompile of the latest version of iTween for 5.3: iTween_5_3_0_0.zip - Google Drive
Keep in mind, this is the new version of iTween which is incompatible with the old version. If you didn’t use UE5.2, you may be confused about the new functions and workflow. Please see this post. If you haven’t already, you will need to download the 5.2 version, upgrade your code for the new iTween style, then upgrade to 5.3. I apologize for the massive confusion and headaches this may cause!
As for the marketplace, they won’t allow me to post this there until I have extensive documentation, which I am still working on. I don’t have an ETA on that yet and I apologize, time has been a difficult resource to find for a while now.