Australia fines X $386K for inadequate response on child safety measures

X failed to adequately respond to regulator's questions about detecting and removing child sexual abuse material.
X's detection of child abuse content declined after acquisition by Elon Musk.
Regulator says X's non-compliance more serious than other companies.
Daily fines up to $493K could be imposed if X doesn't comply.
Comes amid criticism of X's content moderation after Musk takeover.