React Native > 60, wth autolink, but no pod spec

[!] use_native_modules! skipped the react-native dependency '@envoy/react-native-signature-pad'. No podspec file was found.

Check to see if there is an updated version that contains the necessary podspec file
Contact the library maintainers or send them a PR to add a podspec. The react-native-webview podspec is a good example of a package.json driven podspec. See https://github.com/react-native-community/react-native-webview/blob/master/react-native-webview.podspec
If necessary, you can disable autolinking for the dependency and link it manually. See https://github.com/react-native-community/cli/blob/master/docs/autolinking.md#how-can-i-disable-autolinking-for-unsupported-library

envoy / react-native-signature-pad