Fedora: Small Caps in Impress
Writer supports Small Caps, but Impress and drawing shapes in general never fully supported Small Caps. The option was available, and the character dialog provided a preview, but Small Caps was rendered the same as All Caps, as seen here.
This has lingered for years and it's not easy as a user to try and manually workaround with varying font sizes because underline/overline/strike-through decorations won't link up, as seen in this example...