It appears that the development of Yupana has taken until 2022 due to the complexity of the project. It is likely a technical issue, as the team behind Yupana started their work on the project only one year ago. This suggests that the development process is taking longer than expected, as they are likely having to work through any technical issues that arise. Additionally, it is not as simple as simply forking Aave, as there are likely other complexities involved in the development of Yupana. As such, it is likely that the team is taking their time to ensure that the project is built to the highest standards.