@DTS Engineer just to add. If the apple-developer-merchantid-domain-association generated for one merchant id works for merchant ids too, then pls Apple documentation should be updated. Because like @Aedelman my understanding from the Apple docs has been that only merchant id is supported on one url.

@Aedelman thanks a lot. We have been stuck on this only. I checked the file contents and the JSON payload has Team ID, domain and the timestamp. Thankfully no merchant id. So my understanding is that this file is not validating the merchant id to domain but rather the issuer of merchant id to the domain.