How to redirect from old sub-domain to new sub-domain on shopify?

[CYKS]

My old sub-domain website: uk.domain.com was under shopify. Now I have to change to eu.domain.com but still within shopify environment.
After looking at the Shopify guide, it does not help much since I can only insert the URL path.
What can I do to make sure the old sub-domain redirect to new sub-domain?
Thanks.

[masoomi-saxena]

Hey there, there are two simple ways to do that:

One method is to use Shopify’s URL redirects, where you can set 301 redirect by going to Shopify Admin > Menus > URL redirects > Create URL redirect. You can also import the redirects in bulk.

An easier approach would be to use a Built for Shopify app like AdNabu’s 404/301 URL Redirects app. It offers a quick URL redirect fix in just one click. It also detects 404 errors and creates a 301 redirect without any hassle. You can also use bulk redirect and get detailed insights into all the links.

[CYKS]

Probably I did not elaborate further.
I have a few sub-domains. I did try to use the usual redirect path and the uk.domain.com was removed and it does not redirect properly.

[CYKS]

On the browser, this is what I get:

[tim_tairli]

You need to connect both domains to your store.
Select new domain as primary in Settings=> Domains and the old one as “Redirecting domain”

Like this: