Shreya is still singing a lot. In case of bollywood, the record labels are not promoting her songs well coz she is an independent artist (not signed under any music label). Search her songs manually, you will get to how much and how good she sings than any other singer.

Another point is, she has been singing for regional industries wayyyyy more than any other bollywood singer, since her bollywood debut. Some regional musicians also say that her diction is better than other native artists. And singing is always the best.

She is simply phenomenal just getting somehow underrated thanks to music labels.