It almost certainly is. Making RoboTaxi into the "Model 2" (sic) is only a matter of bolting on drive-by-wire controls. Tesla is already ramping up this technology via Cybertruck, since it can absorb the initially high cost.

However the moment Tesla officially announces it, they Osborne themselves in the foot. Hence they're playing it close to the chest until the product is almost ready for sale.

https://en.wikipedia.org/wiki/Osborne_effect