It is possible that due to your region it may not be available as I’m located in the US, I’m unable to speculate. I should also advise that Smart Things Labs may only be available for certain devices, models, and countries.
If the option is available, it is located when entering into Smart Apps Menu. In your first screenshot, you are attempting to add a Smart App. In your second screenshot, you instead entered the Smart Apps Menu.
From the SmartApps Menu
What options do you see upon selecting the (…) Three Dot Menu located to the right of the (+) symbol? Is there an option for Smart Things Labs? If it does not appear here, I’m afraid it may not be available for your region.
Here’s a screenshot of what you should see:
If the feature is located, you would scroll down to Virtual Switch, and the options to create the switch would look like below: