Supported Australian Carriers

Telstra, Optus and Vodafone are the supported carriers in Australia. We are having issues in some rural locations with Telstra connectivity and want our devices to flip over to Optus or Vodafone when Telstra isn’t connecting. Telstra supports CAT-M1 and CAT-NB1 on Hologram. Do you know if both of those protocols are supported on Optus and Vodafone on Hologram in Australia?