A proper noun or adjective in a hyphenated compound retains the capital:
In general, do not capitalize prefixes or suffixes added to proper nouns:
The President-elect will tour the mid-Atlantic States in an American-made car.
Do not capitalize the second element of a compound if it simply modifies the first or if the hyphenated elements make up a single word:
© Services publics et Approvisionnement Canada, 2025
TERMIUM Plus®, el banco de datos terminológicos y lingüísticos del Gobierno de Canadá
Ayuda a la redacción – The Canadian Style
Un producto de la Oficina de Traducciones