Slow Start-Up Time

My app is taking too much to open approximately (7–12 secs).
In development mode, I observed a gap(15 secs) in the node server between bundling and the first console.log() of the "index.js" file(very first file).
I have enabled Hermes
I have started using inline require
I have removed unused files and unused reports

Can you guys please help me with this, this is very urgent(I am stuck in this for the last 1–2 weeks).
Please refer to the image to see the gap. (//TRE is the first console.log in the "index.js" file.)
(https://dev-to-uploads.s3.amazonaws.com/uploads/articles/cw0p1vd0qn00vu4dzgek.png)

//This is my package.json
"dependencies": {
"@babel /runtime": "^7.15.4",
"@react-native-async-storage/async-storage": "^1.15.4",
"@react-native-community/clipboard": "^1.5.1",
"@react-native-community/masked-view": "^0.1.11",
"@react-navigation/drawer": "^5.9.0",
"@react-navigation/native": "5.1.4",
"@react-navigation/stack": "5.2.9",
"@twotalltotems/react-native-otp-input": "^1.3.11",
"axios": "^0.19.2",
"moment": "^2.29.1",
"react": "16.13.1",
"react-dom": "16.13.1",
"react-native": "~0.63.3",
"react-native-bcrypt": "^2.4.0",
"react-native-calendar-picker": "^7.0.3",
"react-native-datepicker": "^1.7.2",
"react-native-device-info": "^8.1.3",
"react-native-elements": "^3.4.1",
"react-native-gesture-handler": "~1.7.0",
"react-native-keychain": "^7.0.0",
"react-native-material-ui": "^1.30.1",
"react-native-modal": "^12.0.2",
"react-native-modal-dropdown": "^1.0.1",
"react-native-reanimated": "~1.13.0",
"react-native-safe-area-context": "^3.3.2",
"react-native-screens": "~2.10.1",
"react-native-selectmultiple-button": "^0.1.105",
"react-native-splash-screen": "^3.2.0",
"react-native-sqlite-storage": "^5.0.0",
"react-native-svg": "^12.1.1",
"react-native-unimodules": "~0.11.0",
"react-native-vector-icons": "6.6.0",
"react-native-webview": "^11.6.5",
"react-navigation": "^4.4.4",
"react-redux": "7.1.3",
"redux": "4.0.5",
"redux-logger": "^3.0.6",
"redux-persist": "^6.0.0",
"rn-fetch-blob": "^0.12.0"
},
"devDependencies": {
"@babel /core": "~7.9.0",
"babel-jest": "~25.2.6",
"jest": "~25.2.6",
"metro-react-native-babel-preset": "^0.58.0",
"react-devtools": "^4.13.5",
"react-native-svg-transformer": "^0.14.3",
"react-test-renderer": "~16.13.1"
},
"jest": {
"preset": "react-native"
}