where are the "Air India" planes gone?

i usually travel between DEL-BLR and there used to be enough Air India planes between these cities (the ones with 3 digit codes) including the nice A350 which i flew a few times, but now all i see are Vistara 2xxx flights and maybe 1-2 787 flights per week my biggest gripe with the Vistara planes is that they don't carry pets in hold, which i require - learnt it the hard way by wasting over 10k and ending up as a no-show on a flight. the pieces of shit have not mentioned this on their website and did not do anything even after raising it till the Appellate authority it has become increasingly impossible to travel with my pet between these cities now that there are so few flights available. so where are the planes? i don't see them showing up in searches for other cities either