Hello.
I have moved your post to the relevant community as it is related to wireless connectivity.
As I said on the ot-nxp post, in the latest SDK releases, we removed the SDK OT hybrid examples because we switched focus to Matter as the hybrid OT+BLE apps for K32W0x1 family. We also fully switched to ot-nxp app development which uses the SDK and exercise similar features to the older OT hybrid examples. You can find them here .
I am analyzing your request to see what's the best path for you, to have your older REED hybrid example ported to ot-nxp apps or to have a patched SDK that can run with your application with the latest OT stack. I would incline to the first as it would align your implementation to future releases.
As for the stack version in 2.6.4, I can confirm that it's OT 1.1 certified, but on an older commit.
BR,
Mihai