HI there,
I use the post object function to bind a woocommerce order to a post and it works very well. it is possible to add more order information inside the drop down list? Which you can see in the backend. At this moment you can see the order date and the status.Is it possible to add further information? for example the order number and the name of the customer

hi, me again.
the adjustment of the search results worked very well, but unfortunately the entries cannot be searched. It always shows “no results found” or if i enter two numbers in the search, wrong results are shown.
do i have to adjust anything else?
The post object field, like the relationship field, searches post content and post titles. It can only find text in these two fields. This likely means that orders do not use these fields.
I do not know anything about how WC stores orders so I cannot give you any specific information. What you will need to do is figure out how the orders are stored and locate the data you want to search. Then you will need to modify the search query “WHERE” statement to include this data in the search in conjunction with acf/fields/post_object/query.