https://www.cnet.com/news/alexa-coming-to-bragis-smart-earphones-in-october/

Over time Bragi has been steadily adding new features to its totally wireless "smart" earphones and in October owners of The Dash and Dash Pro will be able to add Amazon's Alexa voice assistant by downloading Bragi OS (BOS) 3.1 at update.bragi.com.

Onvocal's OV was the first wireless Bluetooth headphone to be Alexa-enabled, but look for more wireless headphones to add Alexa in the coming months.