Help - Inject zones or customizing

I want to inject a component into the strapi admin auth UI (login/register) pages. or be able to customize the styling of it. I couldnt find any documentation on doing this. any ideas?

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patch-package and edit the core code in your node_modules folder.
There is currently no way of customising it in the admin dashboard or via a plugin afaik.

I don’t think patch-package is still an option for the latest Strapi (4.23.0). We only have dist folder in @strapi/admin package. Did anyone figure a way to do it?