I have verifies and connected my checking about with square. But it isn't showing up as a purchase option on my web site.
You’ll need to do a little more than just verify your account.
Are you using the Square Online Store? If so, have you created the store and items in the store? More info on setting up your online store can be found in this help article.
If you’re using another eCommerce solution you will need to consult their documentation on how to interlink your store and Square.
Good luck, and happy selling!
Square Community