In the request body of a scenario-specific message, if the API request URL version is V3 (https://push-api.cloud.huawei.com/v3/[projectId]/messages:send), the message can be pushed to HarmonyOS NEXT/5.x and later versions. If the API request URL version is V2 (https://push-api.cloud.huawei.com/v2/[projectId]/messages:send), the message can be pushed only to HarmonyOS 3.x/4.x.
Use the API request URL of the V3 version (https://push-api.cloud.huawei.com/v3/[projectId]/messages:send) to push messages.