Parsoid is relying on CSS to style Cite output and as part of T86782: Use CSS to style Parsoid's Cite extension output, we created the default ext.cite.style.css and the ext.cite.style.fa.css as the override for language fa. These are part of the Cite extension. We need to create additional language-specific CSS modules for all languages that might possibly customize numbering of references.
Look at https://www.w3.org/TR/css-counter-styles-3/ and the predefined style counters that are available