This sort of news is purely propaganda brief to create good PR without any actual proof shown. Most of the time its based on very minute thing like a few prototype rounds are test fired with close coordination of Army. That is not induction at all. Only when CEMILAC certification is complete can a system be inducted formally and that process is a lengthy one.
Naturally no one will ask the reporter or DRDO about it , or even apply common sense.
proof is in below 2-3 para
“Once developed, the Indian Army is free to use this in any number of 155 mm shells as it can retrofitted on to an existing 155 mm artillery shell,” says Ramakrishna.
At the moment, the shell is undergoing developmental trials with IIT Madras even while it has been successfully tested in trials at Rajasthan’s Pokharan field firing ranges.
On whether the ramjet-powered shell can be fitted for the M 777 ultra-light howitzer, the IIT Madras professor said: “Once the technology is developed it can be used on any gun system that the Indian Army has in its armoury.”
So the technology is not yet fully developed and proven but already PR pushing for induction of the product.