No, they use Bluetooth LE adapter on the battery cover to connect to MFI / ASHA device, which is way behind Cochlear/AB. which is integrated…
Cochlear Ltd was able to do this alone by funding GN LEWIS development team at GN group and they had the cash to spend on R&D in integration and support GN LEWIS platform team for many years.
AB was brought by Sonova and gave the AB the SWORD chip
GN LEWIS is the codename for LE radio used in both Resound HA and Cochlear sound processor