Text Messages sent by Hytera HT to Hytera HT through MotoTRBO repeater or MotoTRBO HT to MotoTRBO HT through Hytera repeater will go through. The portable radio generates the RF signal with data in the carrier the signal is passed through the repeater unchanged and the receiver accepts the signal therefore the HT's will get the text messages. It is not the repeaters that are not compatible, voice is unaffected and will be heard by all models of radios in DMR. The protocol Motorola set up for there text messaging is what is not compatible.
This all assumes I understood your question correctly.