If not, it won't show up in Alexa's device list either, and the problem is likely the computer isn't set as the default computer set in your profile, or your computer doesn't have the voice field set (something like "laptop").
One or the other needs to be true, but if you only have one computer, I recommend setting it as your default so you don't have to say "turn on calculator on laptop". You can just say "turn on calculator" instead.
If you've confirmed the above, you could try Remove All then Discover here:
EDIT: I noticed you set your computer's name as "Turn monitors off". That should be something like "laptop" instead because that's what you're using to refer to your computer when you use Alexa or Google Assistant.
@russ The command if appears in Smart Home Voice Commands:
I haven't actually made any changes, just removed the command and added it back. It was working fine for me until yesterday.
The problem is that my Alexa app does not recognize these commands as a new device added.
@russ If I run it from the computer it works perfectly, the problem is that Alexa does not recognize the new device, even when I give it the command it tells me that it cannot find the device.
@ricardomat, the voice field for the command should be something like "monitor", then Alexa will create a device called monitor and you can say, "Alexa, turn monitor off".
Your voice field is set to "monitor off" which will confuse Alexa because you'd need to say, "Alexa, turn monitor off off."
But, it should still show up as a Smart Home device. Do you see it listed here?
Also, please confirm you can run the command from the website.
@russ It is not listed here: https://alexa.amazon.com/spa/index.html#appliances
That's the problem, that before yesterday, if I added a command Alexa recognized it immediately, in my phone application, in the echoes, everywhere, but not since yesterday.
And yes, I can execute the command from the website and from the agent on my pc.
@russ I also tried disabling the skill in Alexa and re-enabling it even tells me that Alexa is linked to my account.
@russ Here I show you how the Skill is activated and linked to my account:
I might see the problem. That screenshot is for the wrong skill. You need the TRIGGERcmd Smart Home skill.
The screenshot you show is for the old original skill that doesn't create Smart Home devices.
@russ Oh bro, that was the problem. It has been solved, thank you very much for your help!
@ricardomat, awesome. You're welcome.