That Still doesn't specifically answer whehter it is supported on Multilink PPP or Multilink Frame-Relay (MFR). It looks like I can add the Auto QOS commands under the DLCI's and the multiple physical interfaces for MultiLink PPP setup but not the multilink groups themselves. Is this the correct way to set this up?

Serial Interface Restrictions

• For a serial interface with a low-speed link, Multilink PPP (MLP) is configured automatically. The serial interface must have an IP address. When MLP is configured, this IP address is removed and put on the MLP bundle. To ensure that the traffic goes through the low-speed link, the following conditions must be met:

  • The AutoQoS—VoIP feature must be configured at the both ends of the link.
  • The amount of bandwidth configured must be the same on both ends of the link.

Frame Relay DLCI Restrictions

• The AutoQoS—VoIP feature cannot be configured on a Frame Relay DLCI if a map class is attached to the DLCI.
• If a Frame Relay DLCI is already assigned to one subinterface, the AutoQoS—VoIP feature cannot be configured from a different subinterface.
• For low-speed Frame Relay DLCIs configured for use on Frame Relay-to-ATM networks, MLP over Frame Relay (MLPoFR) is configured automatically. The subinterface must have an IP address.

When MLPoFR is configured, this IP address is removed and put on the MLP bundle. The AutoQoS—VoIP feature must also be configured on the ATM side of the network.

• For low-speed Frame Relay DLCIs with Frame Relay-to-ATM Interworking, the AutoQoS—VoIP feature cannot be configured if a virtual template is already configured for the DLCI.

Just incase someone else is searching for this information.   https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_auto/configuration/15-mt/qos-auto-15-mt-book/qos-auto-voip.html