yup validation to Validate formki field whether starts with value of other input field

Question

I have 2 fields in my form say carriercode and billnum, here I need to validate number should always have value of carriercode as a prefix, ex if carriercode=ABCD blnum should be ABCD followed by any charter can be string or number.

return Yup.object({
    carriercode: Yup.string().required(requiredMessage).min(4,"length should be 4").matches(/^[a-zA-Z0-9-]+$/,"Can not contain special characters like ),(,@ etc."),
    blnum: Yup.string().required(requiredMessage) //validate if blnum starts with carriercode
     
  })
}

is there any way to achieve this using yup validations, to be simple I need something like startsWith/indexOf functionality in yup.