@Marc Milliken Thanks for reaching out. Currently V2 sku's doesn't support wildcard domain names will discuss internally to update the document.
There is also a known issue that you can't use the same wildcard certificate for multiple endpoints in v2 (i.e, cannot use the same certificate/thumbprint for different type of custom domain in skuv2).
Regarding the limitations for v2 tiers, it is true that they don't support multiple custom domain names. Unfortunately, there is no way to get around these limitations on v2 tiers.
please feel free to leave your feedback at aka.ms/apimwish
I hope this helps! Let me know if you have any further questions.
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