The Pew article Growing share of Americans say they want more spending on police in their area by Kim Parker and Kiley Hurst (10/26/2021) compares police spending polls from June 2020 and Sept 2021. The overall summary is in the graph copied here. There are other charts including a breakdown by race, ethnicity, age, and political leaning. For example,
Among Democrats, Black (38%) and Hispanic (39%) adults are more likely than White adults (32%) to say spending on police in their area should be increased. There is no significant difference across these racial and ethnic groups in the share of adults who say spending should be decreased.
Within the GOP, White and Hispanic adults differ in their views on this question: 64% of White Republicans say police spending in their area should be increased, compared with 53% of Hispanic Republicans.
Pew included a methodology section for both polls.