SOLVED!
Found the answer in the T3X2R manual…
SYPHON & SPOUT works with an external object that you should install for send the video from Render to SYPHON / SPOUT client. This take you one minute.
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Open Max editor from the first button, top right, on a Max for Live device.
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Into the Max application open Package Manager from File menu.
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Search for Syphon or Spout, depending on your operating system. Syphon > Mac / Spout > Win
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Install the recommended pack. After, close the Max application [cmd/cntrl + q]. Ready!!
And of course… eSyphonOut is now eVideoSend > EboSuite 2.0 (release date 2022-04-11)