Auto update doesn't work : MAC os Target .pkg

Question

Previously we were using .dmg target and published on the S3 bucket, So on S3 and electron app it creates latest-mac.yml and app-update.yml files automatically, and for the next version app automatically update.

But Right now we are using target as .pkg . The auto-updater is now stopped. latest-mac.yml and app-update.yml are not creating for .pkg target. But build uploaded to s3 successfully.

package.json

"package-ci": "yarn postinstall && yarn build && electron-builder --publish always",
.....
"mac": {
      "entitlements": "build/entitlements.mac.inherit.plist",
      "entitlementsInherit": "build/entitlements.mac.inherit.plist",
      "icon": "./resources/icon.png",
      "target": [
        "pkg"
      ]
    },
    ........
     "publish": {
      "provider": "s3",
      "bucket": "build",
    }