I overwritten ConfigProviderInterface and got values when loading the checkout page and it works really well, but the problem is this.
My variable window.configmsg depends on the shipping country. So if every customer changes the shipping country, we would like to change the message. in the order review block (comes from window.configmsg) according to country selection. It works fine when the page loads (when the country is selected), but doesn't work when the customer returns and the fourth when selecting the country.