It could also be that the Indian A women's team took this match very lightly because they had already won the series and that is why they did not afford much in this match and as a result the Australian A women's team was able to win?
I think India A women did not take this match lightly, because Australia A women won the T20 series 3-0, so maybe India A women wanted to win the ODI series 3-0, but India A women did not succeed. However, today the performance of the top order batsmen of India A women was not good, their strike rate was very bad, Shafali Verma was the only batsman who scored a half-century and Yastika Bhatia was out for 42 runs, besides the performance of all the other batsmen was not good, due to which Indian women could not give enough run target. If Australia A women could have done well in the first and second matches like in this match, then Australia women could have won the series. Australia A women played at home but could not perform as expected in the ODI series.
I think that in international matches, no team takes any match lightly. T20 series is a different format and ODI series is a different format, I think there is a lot of difference in the two formats. However, in the first two ODI matches, India A Women's team performed well and they won, in the last match they could not perform well because of which they lost. Australia A team's Healy and Tahlia Wilson were opening like in T20 matches and they opened with a partnership of 137 runs in just 97 balls. Healy remained unbeaten on 137 runs in 84 balls, Australia A women reached the target in just 27.5 overs with nine wickets in hand. It is true that Australia A Women's ODI series at home has not been a happy one.