Ethiopic literature will apply ordered numbered list using both Ethiopic and Western numeral systems. Ethiopic numeral lists are addressed in the Ethiopic Numeric Counter Style section of the CSS Counter Styles Level 3 specification.
That is only one counter style. There are other counter styles defined for the Ethiopic script in
3.7.5 Numbered Lists http://w3c.github.io/elreq/#numbered_lists
That is only one counter style. There are other counter styles defined for the Ethiopic script in
Custom Counter Styles, section 7 (title may change soon) http://w3c.github.io/predefined-counter-styles/#ethiopic-styles
We should probably include links to that section too.