Checkout
WooCommerce's checkout.
The block renders through the wc_checkout element — the same PHP that runs in the page builder, so the front
end is identical either way.
This element ships with the WooCommerce extension, which is inactive by default, and it needs the WooCommerce plugin installed and active.
With either missing the block does not register at all — so it appears in the inserter exactly when it can actually work, rather than as an entry that renders nothing.
WooCommerce routes real behaviour through the pages configured under WooCommerce → Settings → Advanced. Placing this block on some other page renders something that looks right without being the page the shop is configured to use.
Use it to rebuild the configured page with UnysonPlus elements around it — not to create a second one.
Settings
This element has no settings of its own — it renders WooCommerce's own template, and its appearance comes from WooCommerce settings and your theme. The block says so in the sidebar rather than showing an empty panel.
WooCommerce routes payment gateways and order handling through the page configured as the checkout. A checkout block on a different page produces a form that looks right and is not the one the shop is configured to use — which surfaces as payments that do not complete.
Rebuild the configured checkout page with this block; do not make a second one.