Easy way to share MID (or visitor ID) between domains

When the 3rd party cookies are blocked, the Visitor ID is not being shared between different domains.

I have implemented a custom code to accomplish the Visitor.appendVisitorIDsTo(URL) solution: 

https://experienceleague.adobe.com/docs/id-service/using/id-service-api/methods/appendvisitorid.html?lang=en#id-service-api

Don't you think that it would be useful to create an extension to accomplish this in an easy way? Something like Google Tag Manager does for this scenario that it's a simple checkbox specifying that you need "cross-domain" tracking.

I think that this is not something difficult and it would help a lot of "non-technical" people.

Regards.