Hey there,
Looking at your screenshot, the “pay” button is indeed missing:

Link to image: https://d.pr/i/b9cFaS
I checked this on my test site using the Twenty Twenty theme and was able to see the pay button at checkout:

Link to image: https://d.pr/i/mr33QQ
This points to a difference between our sites – it’s usually an outdated PayPal Checkout plugin, or possible a theme/plugin conflict.
This kind of problem is usually caused by either a conflict with your theme or with another plugin.
?
The best way to determine this is to:
- Temporarily switch your theme to Storefront
- Disable all plugins except for WooCommerce
- Repeat the action that is causing the problem
If you’re not seeing the same problem after completing the conflict test, then you know the problem was with the plugins and/or theme you deactivated. To figure out which plugin is causing the problem, reactivate your other plugins one by one, testing after each, until you find the one causing conflict. You can find a more detailed explanation on how to do a conflict test here.
If that doesn’t solve things for you, can you please share the following so we can take a closer look?
1. Copy of your site’s System Status: you can find it via WooCommerce > Status. Select “Get system report” and then “Copy for support”.? Once you’ve done that, paste it here in your response.
2. A link to a product on your site, so that we can add that to the cart and view the checkout page to see what’s happening.
When you’re checking console errors, which browser are you using?