Until they can't refrigerate their insulin, then it becomes an issue.
Yes, we have to change the mindset that these groups, be they identified by race, religion, gender, or locality are monoliths. However Covid hurt a lot. The party was hampered by no in person canvassing. The republicans thought Covid was bullshit, and they waded through it, right up to people's doorsteps. The dems couldn't do that and not come off as hypocrites. The lack of face to face on porches or in events is critical.
You are right. It is usually the school districts and utility type districts that are non-partisan. But you can usually find where a party has endorsed a candidate or not. I will say I firmly feel that local races for everything from dog catcher to county judge should be non-partisan. Let them win based on their merit and ideas, not the letter behind their name. And make it ranked voting as well.