I actually don’t know if this is true. Everything you listed about chinese/Indians not voting or being engaged civically applies very broadly to the Hispanic vote also. Hispanic engagement is quite low, because of many immigrants cannot vote (same as Chinese/Indian), Because civic engagement isn’t common (again same) and language barriers. Additionally the idea that Hispanics are a democrat leaning population isn’t true. Many sub populations are staunchly religious (catholic) and would vote to overturn roe v wade same as evangelicals.

Additionally, the focus on DACA and Hispanic immigration may be because of size: Indian and Chinese immigrants aren’t even 5% of the USA out together, while immigrants just from Mexico are a whopping 11% of the USA.