DC is going to be pretty different than the Bay Area because you have a semi-decent number of white evangelical transplants there working for conservative politicians or organizations. Obviously, there are going to be conservative evangelical churches for that population.
As for how white evangelicals in San Francisco vote, I have no idea. Evangelicals in SoCal, on the other hand, still seem to be staunchly conservative based on the anecdotal examples I've seen. My church (which votes well to the right of white evangelicals as a whole) has gotten a decent influx of California transplants, and they don't seem to be any more liberal than the rest of the church. Even our young adults ministry was easily >95% Trump, and the California transplants seem no different than anybody else. Now, most of California is different than the most liberal parts of the Bay Area, and there's probably some degree of self-sorting in who lives there.
What denomination is your church? But I agree that white evangelicals in most of Southern California are still heavily Republican given they tend to be older.
The only cities where I could see white Evangelicals being mostly Democratic are cities like San Francisco, Boston, and New York City along with perhaps Philadelphia, Chicago, and Seattle. White evangelicals there are probably heavily younger professionals with college if not graduate degrees (considering the white working class population in most of the cities I mentioned tend to be Catholic) and those actually living in urban centers probably are selected for those more accepting of cultural liberalism. Moreover, Evangelical congregations there often have large Asian-American (especially Korean and Chines) presence even in non-ethnic churches meaning there's further leftward social pressures. Tim Keller's Redeemer Presbyterian Church in Manhattan is a good example and its hard for me to see most of the congregants there show any enthusiasm for Trump. I could even see Keller himself vote for Biden, something I can't say for most white Evangelical pastors.
Biden got like 23% of the white evangelical vote in the past election which was an improvement from Hillary and I imagine that it's among these groups that that shift occurred. I can't see many of them voting for Trump the first time either though so perhaps some went third party or didn't vote last time and just saw Biden as more tolerable then Hillary this time.
