Currently for content elements, there is a replacement tag provided in SCC which lists the customers Address.CountryName.
However, especially in embedded forms and other situations, you would rather work with the ISO country ID.
Suggestion to provide the country ID as well on the replacement tags.
Also for country name, suggestion to use the customer country and map it with the country from GetCountries instead of relying on Address.CountryName to ensure uniformity and translations.