I was confused by the wording
Ah, apparently ”Show content warnings” on the app is the opposite of what’s ”Always expand posts marked with content warnings” in the web UI. I was confused because the former refers to the warning, whereas the latter refers to the content. There may be minor usability issue there, but I’ll leave it out of this one.
Sorry for the noise. To make up for it, #290 looks like a duplicate of this one and thus could possibly also be closed.