Screenshots of the Android app, comparing the Light, Dark, and Black themes for the article Tensegrity: https://imgur.com/a/3qOrFTL.
While the themes show inline math fine, when it is indented using <math display="block">, it is not adjusted to match the theme. For the Dark theme, the contrast is low, and in the black theme it's completely unseeable.
Note, this method of indenting formulas is officially supported by the extension, and mentioned in English Wikipedia help documentation.