The CDC publishes a weekly chart showing the proportions of circulating variants for the US as a whole. The Delta variant had previously driven most other variants near extinction, and now Omicron is doing the same to Delta. https://covid.cdc.gov/covid-data-tracker/#circulatingVariant...
Here are some links saying you can get both:
https://www.inquirer.com/health/coronavirus/omicron-delta-en...
https://www.express.co.uk/life-style/health/1543522/can-you-...
https://www.miamiherald.com/news/coronavirus/article25678686...