It was a pretty big event so I know we all remember it as long as you follow current events, but it's easy to find articles mentioning it.
https://www.wsj.com/articles/cities-reverse-defunding-the-po...
https://www1.cbn.com/cbnnews/us/2021/february/minneapolis-re...
https://www.washingtonexaminer.com/news/portland-mayor-addit...
Cities defunded police departments, crime went up, some of those same cities then later re-funded those departments, and even increased budgets.
The crime statistics and city council laws passed support these claims, I have not found any claims disputing these facts.
Even the left most leaning sources agree with these claims.
https://www.dailymail.co.uk/news/article-9625629/REFUND-poli...
So they didn't actually do anything.
Some cities backpedalled on their promise to defund and added to the budget instead.
The existence of the latter scenario does not nullify the former.