"... very well documented event"
https://fortune.com/2021/12/10/taiwan-investigates-covid-lab...
https://www.taiwannews.com.tw/en/news/4371080
https://www.newsweek.com/taiwan-lab-worker-mouse-bite-covid-...
As one quick example, here’s a news clip including an interview with the Taiwanese health minister discussing details of the (then) ongoing investigation:
You can trivially find many more official statements about the event and subsequent investigation, if you like.