Thumbnail not showing on X when linking home page

I have a domain and have it connected via DNS records.

The site loads, everything works.

Under Website -> Social Sharing I added a thumbnail (600px).

Now, when I link my domain (e.g. mydomain.com) on X, it doesn't show the SEO Site Description or the thumbnail in the twitter card.

When I include the URL slug to my home page mydomain.com/homepage, the SEO Site Description appears.

I changed the name of the URL slug recently so I'm assuming the thumbnail hasn't propagated yet when adding the URL slug.

However, if I link a child page that's not the homepage, mydomain.com/black-shoes, the thumbnail shows on X.

I'm going to assume, that the SEO Site Description and Thumbnail is tied to the URL slugs but not mydomain.com/

Do I need to add a redirect at the registrar?

Or add an entry under URL Mappings?

I tried this :

/homepage -> / 301

I do want to mention that if I share my website via text or Facebook the thumbnail shows up.

I find it odd that on X, when linking my website(just the domain), nothing shows only when adding the URL Slug.

Thanks in advance.