Preselect shipping method (tablerate_bestway) on PayPal Express Review Page in Magento 2

I tried to preselect the shipping method (in my case tablerate_bestway) in dropdown field on Paypal Express Review Page, because we always have just one method to select. added this to end of mytheme/Magento_Paypal/templates/express/review.phtml and works fine:

but in addition I´m looking for a method to refresh page in same script to get the shipping costs into the order totals block (to show the shipping fee for the current order before checking out). Currently it only reloads when reselecting the dropdown function again. I´m using Magento 2.3.2

Help really apprechiated.