There are a range of excellent resources available for your use for this Hackathon. Here is a compilation we have made that could be useful for you and your teams to explore:
https://spatialagent.org/Biodiversity/
In this compilation, you will find links to common biodiversity (and habitat/ecosystem) primarily related public-domain global data, platforms, visualizations, and knowledge resources to get you started!
We will keep updating these as we find out more. Please do send us any additional suggestions at spatialagent@worldbank.org so we can update this collection.