Literally no police departments have been "defunded" yet - even in places where they have been trying, the cuts have not taken effect.
Any stats about a rise in crime is very misleading. The cause of the rise in crime is in no way related to systematic policy changes in funding because there have been no changes made.
My understanding is that "defund the police" is to advocate that police is no longer the default caller and the default receiver of money when it comes to broad social issues like, say, a mentally ill person acting erratically, or a homeless person is behaving in crisis, or a similar nonviolent occurrence. The money should instead bolster our public health, public education, and social security and child care services. This is in response to the fact that the police broadly get an obscene amount of money and apparently have very little social good to show for it with no accountability.
Any stats about a rise in crime is very misleading. The cause of the rise in crime is in no way related to systematic policy changes in funding because there have been no changes made.