Effective Friday, January 7, 2022, travellers might be permitted to enter Barbados with a legitimate negative Rapid PCR COVID-19 test result, 24 hours prior to arrival, or a negative Standard RT-PCR COVID-19 test result, done inside three days prior to arrival.
That is probably the most recent update (January 3, 2022) to the Barbados Travel Protocols https://www.visitbarbados.org/covid-19-travel-guidelines-2022.
Accepted tests include those which were taken at an accredited or recognised laboratory by a health care provider via a nasopharyngeal or oropharyngeal sample (or each). LAMP tests, self-administered tests, or home kits and tests using saliva samples won’t be accepted. (BGIS)