Clicking on it just doesn’t take any action at all.
@kalen I think we can make the subdomain and redirect the link as well
And that button not works 
Hey @kalen and @andrii 
thanks for flagging this.
I did some digging here and this looks to be related to a display issue we’re aware of and currently working on addressing. On development stores, it’s expected that the ability to change the .myshopify.com domain isn’t available. Currently, the edit pencil still renders, but clicking it doesn’t do anything because the feature isn’t available for these store’s plans.
I’ll follow up here once the issue has been resolved and let me know if you have any questions about this