DRDO has shown no competence in developing a UCP. They are developing NGMBT as a single tank and not as a family of vehicles. They haven't even attempted at doing this to show competence.
A UCP isn't just a tank, it's about 12+ vehicles all based on the same platform. So the same hull, tracks and engine will power all the vehicles. And the top of the vehicle will be modified for different needs, like a main gun and autoloader on an unmanned turret for a tank; a small rapid fire gun, ATGMs and a passenger compartment for IFV etc. Similarly, there will be a recovery vehicle, ambulance, SPH, bridge layer, APC etc, everything using one single design.
The deal is not for Armata, it's a full R&D deal. Foreign OEMs can offer their currently designed UCPs or even a new design, it's up to them, but all the IP will rest with the Indian partner, so it's unlikely that the Russians will offer the Armata itself. This is not a license production deal.
You seem to be referring to the T-95, which was deemed far too advanced and expensive for induction. Armata's T-14 is a less advanced tank that was born out of fiscal realities of the time, made worse by a 25% cut in the Russian defence budget, followed by stagnation over the last few years, hence the delay in its induction.
But...
The batch will include T-14 tanks, T-15 infantry fighting vehicles and T-16 armored repair and evacuation hardware, according to the defense chief
tass.com
“In 2022, there are plans to deliver a pilot batch of T-14 tanks, T-15 infantry fighting vehicles, and T-16 armored repair and evacuation hardware to the troops,” Shoigu said.
Inductions are beginning from next year.
The Russian MIC is more advanced than India's so we are 10-15 years behind them in terms of primary weapons systems like tanks and planes. We have planned to induct AMCA in the 2030s versus Russia's Su-57 in the 2020s, and we are gonna bring in FRCV in the 2030s versus Armata in the 2020s. They also work with a much bigger capital budget than India, by many times. The Russians have taken the lead globally in introducing next gen weapons so it's not a surprise they have taken the lead with the Su-57 and Armata.