Why is a column detected as text and not as categorical when opening excel file?

I have the following values in an excel sheet

Aguascalientes Baja California Baja California Sur Campeche Chiapas Chihuahua Ciudad de México Coahuila Colima Durango Estado de México Guanajuato Guerrero Hidalgo Jalisco Michoacán Morelos Nayarit Nuevo León Oaxaca Puebla Querétaro Quintana Roo San Luis Potosí Sinaloa Sonora Tabasco Tamaulipas Tlaxcala Veracruz Yucatán Zacatecas

When uploading the file in Orange it recognizes the column as text and not as categorical, is there any reason why these values cannot be identified as categorical?