You’re quite right, but it is exceptional that the bill passed the House of Representatives on the same day as its second reading speech, and passed the Senate on the following day [1]. This means that there was little time for debate and amendment within Parliament itself, including by minor parties [2] and independents [3] not represented on the committee that reviewed the first draft of the bill.

[1] https://www.aph.gov.au/Parliamentary_Business/Bills_Legislat...

[2] https://parlinfo.aph.gov.au/parlInfo/search/display/display....

[3] https://parlinfo.aph.gov.au/parlInfo/search/display/display....