Shopify Flow has introduced the operators ‘is any of’ and ‘is not any of’ for more field types, including ENUM and Number fields such as order's currencyCode and customer's orderCount. To use these operators, you simply add commas between the values you want to compare against, like entering ‘CA,US’ to check if an order's currencyCode is Canada or USA.
→ Read the full update on changelog.shopify.com