Not always. After every major update, you’ll need a new updated config file . The old one may cause crashes or reset to default.
Normally, BGMI locks FPS based on device model and chipset. For example: bgmi 90 fps config file upd download repack
While a simple config edit to unlock frames seems like a victimless optimization, downloading a "Repack" comes with significant risks that players often ignore in the heat of the moment. Not always