In short, DA1458x is now officially qualified as a BT 4.2 device, without supporting optional features.
The DA1458x has been qualifeid to supports the required BT 4.2 mandatory features . Please note that it does not support the optional features of 4.2.
For the Bluetooth SIG listing, please refer to the below link:
Controller:
https://www.bluetooth.org/tpg/QLI_viewQDL.cfm?qid=31115
Host:
Device: