Could anyone inform me how to send the new developed template to this platform?
If you mean Typst Universe, then you can read the pages starting from Submission guidelines - Typst Extra Docs. Remember to read Sparse checkout of the repository as well.
And I see that your username looks Chinese, so 如何发布自己的包以及模板 | Typst 中文社区导航 might also be helpful. （我个人推荐方法三）