Hi, this is Steve from tldraw.
As of the recent 2.0 beta release, we have changed our license to permit non-commercial use only. See this article for more information: https://tldraw.substack.com/p/license-updates-for-the-tldraw-sdk .
This means that tldraw is likely not open source in the same way that other apps on Cloudron are open source, and is no longer licensed in a way that is compatible with its inclusion here.
I'll reach out via the support email but feel free to email me at steve@tldraw.com to discuss.