I’m currently in the process of shop redesign and moving the contents of our Wordpress site https://bikeflip.nl/ to our Shopify store https://shop.bikeflip.nl/ in order to have everything on the Shopify, instead of 2 websites. I would like to create a redirect from the Wordpress URLs to their new respective Shopify URLs.
So far there is only one page moved (published) to test it:
a) old page’s url: https://bikeflip.nl/test-ride/
b) new shopify url: https://shop.bikeflip.nl/products/proefrit
For that I created a redirect through the following steps: Navigation > View URLs redirects > Create new URL redirect
However, the redirection doesn’t seem to work properly. The Wordpress page is set to private and after going to https://bikeflip.nl/test-ride/ it goes to a 404 page rather than to the new Shopify page.
Despite adding the whole url, once the redirect is saved it only keeps the last part of the Wordpress URL:
Urls before saving:
Urls after saving:
We are currently using a Sense Theme and for the redesign we will use Local Theme (Shopify Online Store 2.0).
Any advice on how to fix the issue or tips regarding moving content from Wordpress to Shopify are highly appreciated!

