I’m trying to set up a custom domain as a work-around for the third-party cookies issue, but the Custom URL Domain interface in the developer console for my org isn’t allowing the .shop extension.
I reached out internally about this limitation and we are looking to update the domain validation to allow the .shop TLD.
If this is time sensitive and/or you want more details about when this will be available, you can open a support case and cite the internal ticket that was created to track this request: OKTA-357831