She did not repeal the law.
The representatives of the people of Michigan did that.
During the Roe v. Wade reign of error, both sides (pro-life and pro-death) took the positions they did based on false impressions of what would follow the decision being overruled.
In Ireland, abortion was outlawed by a Constitutional Amendment passed by the voters in 1983. That amendment was repealed by the voters in 2018 in a landslide, and repeal was followed by raucous celebrations and street parties that lasted for a week.
The pro-death faction was wrong to fear reversal of Roe v. Wade, and the pro-life faction was foolish to hope for an end to abortion as a result.
In all Western European and European settler societies, abortion is wildly popular, and if subjected to the democratic process it will be legalized everywhere.
Sadly, the fact that amendment was passed back in 1983 probably made people complacent about passing on *why* that amendment was passed and actually teaching people value life and just let "the law" on the books speak for them. The values were not passed on, and forgotten. And you got the 2018 result. 1983 - 2018 is not exactly a long period of time...but clearly enough for complete cultural rot to occur if the previous generations do not properly raise the next generations.