Issue
Android toolchain - develop for Android devices (Android SDK version 30.0.3)
X cmdline-tools component is missing
Run path/to/sdkmanager --install "cmdline-tools;latest"
See https://developer.android.com/studio/command-line for more details.
Solution
If you are a mac user, Just open your terminal and paste
cd Library/Android/sdk/tools/bin./sdkmanager --install "cmdline-tools;latest"
and hit Enter.
This command will install latest version of cmdline-tools.
Then, Run Flutter doctor, The error will be gone.
Answered By - Prajeet Naga