That field is just reporting what provisioning mode is set for (modems have a private provider facing IP address that is used for control and maintenance and can be configured to use either IPv4 or IPv6). There was probably a field above it that said DOCSIS MIMO -Honor MDD IP Mode
That means that Charter is not using IPv6 for their cable modem management, and they have not provisioned the modems to override the MDD TLV5.1 value advertised by the CMTS (tells the modem whether to attempt registration via IPv4, or IPv6).
This has nothing to do with whether or not you can get an IPv6 address to your PC, only how the modem interacts with Charter.
Although they're not offering IPv6 natively, they do offer a 6RD tunnel that you can access if you have a router that supports it.
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