The chat doesn't show on my product page

Most often, the Ask about product block isn't in your published theme yet. Go through this list in order.

What to check

Is the block in your published theme? On Home, check the Widget on product pages row, or the first step of the Get keyplace running guide. If it says Not added, click Add in theme editor, then click Save in the theme editor.

Home in keyplace with the Widget on product pages row, here with the On badge and In your published theme

Did you save the block in another theme? keyplace checks only your published theme. Add the block there too.
Does the product use another product template? The button adds the block to your default product template. If some products use their own template, open it in the theme editor and add the block there too.

The theme editor with the template menu open and the list of product templates

Who can see the chat? Open Settings > On the product page and check Who sees the widget. With Logged-in customers only or a required tag, guests don't see the chat. The block in the theme editor has the same setting.
Is an A/B test running? During the test, half of the shoppers who allow analytics don't see the chat. Check Analytics > A/B test.
Does your theme support app blocks? Older themes don't. See My theme doesn't support app blocks.
Still nothing? Open the product page in a private browser window and reload it.

If the chat shows but doesn't answer, keyplace may be paused. Check the top of Settings.

You're probably editing a theme that isn't published, or you didn't click Save.

No. The block works only on product pages.