@Vlad
Maybe this would be a different feature request, but rather than respecting MacOS's settings, might it make more sense to implement a feature that allows users to adjust the size of the sidebar font (either smaller or larger) independently of MacOS's settings, regardless of whether the side bar is showing Windows, Tabs, Bookmarks, or the Reading List? If so, ideally the sidebar icon size would automatically change with the sidebar font so that the font size and icon size are always proportionate to each other.
If this should be a different feature request, let me know and I can request it specifically.