Where I am going wrong with job switch

I have 20 days of my notice period left and also can leave early but I am not getting any interview calls even as a immediate joiner. Even I am updating my naukri profile daily, applying on instahyre and LinkedIn my resume is also ATS friendly. Domain I am switching for is Cloud, Devops or SRE. Can someone help me with some good strategy and referral. Currently I have total of 3.4 years of Experience.