The panel next to the checkout button is missing. Work through these six causes in order, most common first.
The theme app embed is off. On Dashboard, Locker selection in cart reads Inactive. Press Enable in theme and switch on Wybór Paczkomatu, its name in every store, on your published theme. A duplicated or unpublished theme changes nothing live.
The app is switched off. On the General tab of Settings, App activity must show Active with The app works in the store ticked.
The customer's country is not served. The app serves Poland and Italy. Testing with another country selected explains it on its own.
Nothing in the cart is shippable. A cart of digital products only gets no picker. The panel also lives in the cart drawer, never in the product page body, so a theme without a drawer needs the cart open.
A visibility rule excludes this cart. Rules on the Pickup point visibility card remove the picker silently. Retest with a plain cart holding one cheap, light product.
You are over your monthly limit. Open Plans and look for the badge Limit reached. Over the monthly pickup order limit the picker is not offered to new customers at all. Moving up a plan turns it back on.
Test in a private window. A cached page is a common false alarm right after enabling the embed.
If the picker is there but pickup delivery is missing at checkout, read Pickup delivery is missing at checkout.
Add the post-purchase blocks as well, so an order that missed the picker can still get its point.
Stuck on any of this? Open the chat in the bottom right corner of the app and we will help you set it up.