It appears that year to year 2025-2024 for the same month show a decline in the numbers of CX-30 models in the USA. For example in the attached article and its chart for July 2024 shows 8,679 units sold vs. July 2025, with 4,142. Part of this may be competition, shifts to the USA assembled CX-50, the higher tariffs on vehicles from Mexico where NA market CX-30's are made raising prices, general decline in vehicle sales due to inflation and a slowing US economy.
Mazda CX-30 Sales Figures
Mazda CX-30 Sales Figures