SDKs that require a privacy manifest and signature

Hello, I have a question.

Recently, Apple's announcement asks for "Describing use of required reason API". https://developer.apple.com/documentation/bundleresources/privacy_manifest_files/describing_use_of_required_reason_api?language=objc

SDKs that require a privacy file are specified in the "SDKs that require a privacy manifest and signature." https://developer.apple.com/jp/support/third-party-SDK-requirements/

question 1. Should SDKs included in the list of "SDKs that require a privacy manifest and signature" provided by Apple always include a privacy file? Or you can put the privacy file only in your XCode project.

Question 2. If I don't use any personal information within the SDK, I don't need to insert a privacy file?

thank you.