First, maybe you didn't successfully connected the new worker. Here's an example of a successful worker connection:
Second, if you successfully connect new worker but the GPU/CPU you're using to run the worker is not supported, you won't see your worker on the dashboard.
Third, if you were running your worker normally and it suddenly disappears from the dashboard, it could be due to a problem with the user interface (UI). In such cases, try refreshing the website. If the worker still doesn't appear, please try again later or create a ticket for our support team to assist you