Several states have a pattern of cutting polling places and resources in areas that are statistically overpopulated by the minority party's voters, yes. You'll also see more creative forms of this, like Texas (my home state) limiting each county to one drop box (https://www.texastribune.org/2020/10/27/texas-voting-elections-mail-in-drop-off), with the background context that big (majority Dem) cities annex neighboring towns into their home counties when they annex the towns themselves. See also Texas coming down hard to limit drive-through polling locations because those same big cities implemented the concept as a COVID mitigation and saw a massive increase in voter accessibility. Texas was under a Democratic trifecta until the mid '90s, and is still much more purple than one would expect. We just also have bottom-5 voter turnout rates, partially due to the state legislature pulling shenanigans like I described for the past 25 years.