Greengrass V2 Lambda: Use Thing name in MQTT topic subscription

I'd like to use a device's Thing name in the MQTT topic subscription for a Greengrass Lambda, e.g.:

{
  "topic": "hello/${AWS_IOT_THING_NAME}",
  "type": "IOT_CORE"
}

This question was asked a year ago and the guidance was that this sort of configuration was not possible at that time, and instead one might setup the subscription manually within a pinned Lambda or custom component: https://repost.aws/questions/QU5dTq6p3mTsyT5dFPMtWvGA/v-2-use-thing-name-in-mqtt-topic-for-triggering-lambda

Is that still the case today? Alternatively, would it be possible to use the configuration merge feature to modify the Lambda subscription to a device-specific topic after deployment or some other simple workaround?

Apologies for the duplicate question if indeed the guidance is still the same as before!