You cannot rely on system fonts for PDFs. You must load a .ttf file from your assets.
The most popular open-source choice. It allows you to create documents using a widget-based system similar to Flutter's UI. To support Khmer, you must manually embed a Khmer TTF font like Battambang or KhmerOS . flutter khmer pdf exclusive
Khmer is a complex Indic script. Unlike Latin characters, Khmer involves: You cannot rely on system fonts for PDFs