According to 9to5mac Call first delayed HomeKit support from 2016 to 2018. When Amazon bought the company, some feared they would scrap the plans for HomeKit altogether. The certification indicates that Amazon is pushing forward with plans to get HomeKit support for Ring devices, but it is unclear how long it can take. So, Ring users should not give up on HomeKit integration, but they must remain patient.
̵1; Daniel Feodorov (@mrdanielfeo) May 12, 2019