@Elizeu_S_Dias you seem to be posting questions in any topic that mentions Alexa, even if they are years old.
To be honest, this isn’t the best approach, and it’s beginning to feel like you’re spamming the forum.
The systems that seem to work are…
IFTTT - but this is now expensive, and has always been rather a clunky approach.
Sinric - I’ve not used this myself, but gets numerous good reviews
node-red-contrib-alexa-home-skill for Node-Red - this is the solution I use, and it’s excellent. I also use the node-red-contrib-alexa-home-skill plug-in for Node-Red as a way of getting Alexa to speak the messages that you want to use as custom alerts.
The drawback to this approach is that you need to set-up a Node-Red/MQTT server and prefers switch to using MQTT messages to communicate with your devices and have Node-Red as the single point of commutation with Blynk.
There’s more info on this approach here…
Pete.