The flight data recorder chart on page 114 of the Chinese-language report[0] seems to record that the pilots hit the brakes very hard in the last few seconds, maybe when they realized they were close to overrunning the runway.
That caused a sudden peak of -0.47g deceleration, so it looks as if they could have used the brakes to slow the plane earlier on the runway, but maybe they didn't because they were expecting they could sort out the problem with their spoilers and reverse thrust and stop it in the normal way, without giving the passengers a shock.
edit: that chart's x-axis is the aircraft's position on the 8500ft-runway, and most of the recording traces seem to begin at the point when it had touched down finally with all wheels
That caused a sudden peak of -0.47g deceleration, so it looks as if they could have used the brakes to slow the plane earlier on the runway, but maybe they didn't because they were expecting they could sort out the problem with their spoilers and reverse thrust and stop it in the normal way, without giving the passengers a shock.
[0]https://www.ttsb.gov.tw/media/4912/ci-202-final-report_chine...
edit: that chart's x-axis is the aircraft's position on the 8500ft-runway, and most of the recording traces seem to begin at the point when it had touched down finally with all wheels