If you want, I can (1) draft a sample download page for "Vanavil Anna" including full text for each section, or (2) produce scripts to test Unicode coverage and OpenType features—tell me which.
The Tab Vanavil Anna Font boasts several impressive features, including:
Tab Vanavil Anna is a Unicode-compliant Tamil font developed as part of the "Vanavil" font family by the Tamil Nadu government’s IT department in collaboration with the "Tamil Internet" initiative. The name "Vanavil" translates to "Rainbow," symbolizing the diversity of Tamil letters, while "Anna" typically references a respectful elder or leader in Tamil culture, often associated with the Dravidian movement.