DOES NOT WORK WITH WOOCOMMERCE-SHOP!!!! -> if you need that look here.
If you have woocommerce installed check out this: https://wordpress.org/plugins/wp-migrate-db/
(UNTESTED! PRO IS 90USD)
If you do not have woocommerce installed, but SiteOrigin’s PageBuilder: All kinds of manual database migration/sed-search-replace… did not work out, because „serialization“ get’s lost. (i really wonder how but… hm.)
Here is what worked: