No SAN for privatelink address

Hi, in setting up Azure Cache for Redis, I've noticed that the certificate used by the Redis instance is returning a certificate which has a wildcard for the default `*.redis.cache.windows.net` domain and an extra one for `*.geo.redis.cache.windows.net`, however there is not one for the 'default' private link DNS zone `*.privatelink.redis.cache.windows.net`
Is this intended, if so, what's the reasoning behind this?

No repository files, tests, or entry points are identified. Start by examining the certificate returned by the Azure Cache for Redis private-link setup and the associated DNS configuration. Done means confirming whether the missing private-link SAN is intended and recording the reasoning or required fix.

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