I want two views in one page, but their content depends on a shared Searc field.
It does not have to be solved over 2 views, there can also be two containers in one view.
It is important that the fields from Post 1, Post 2 .... are not displayed one after the other but in separate blocks.
This is actually possible but it won't work with the AJAX refresh for views, you will need to set your view to reload the page itself.
How you will achieve this to setup your first view as normal with your search filters.
For your second view you will need to add the query filters manually by using the query filters section and add the same exact filters from the first view. For each query filter you will need to set it to get the value from the URL parameter. You will need to use the same exact URL parameters that were set automatically in the first view.
For the first and second view you may not see the query filter section. If you don't see it scroll to the top of your view and in the right hand corner you will see "Screen Options" from there you can click and enable the sections that are hidden.
Please let me know if this helps or if further assistance is needed.