Many auto body shops use non-CAPA certified car parts to fix your vehicle. Unless it’s been explicitly stated that they used a CAPA certified or OEM part, body shops usually use non-CAPA certified parts for various reasons: (1) they’re cheaper, (2) they know the quality of the parts since they usually stick to one supplier.
However, this also depends on the state you live in as some states do require body shops to use CAPA-certified parts, while other states do not. Your insurance carrier may also have policies in regards to CAPA versus non-CAPA certified parts during your insurance claims.