Removal of V1 signature of PWA while using it on android device

Hi All,

Greetings to all!

I am writing here because I am getting one issue related to the v1 signature of PWA APK. Let me explain in detail.
We have built the PWA using an Ionic framework. We are installing PWA by using chrome on android device. Now at the time of security check, we are getting vulnerability of V1 signature and mini-SDK version is 19. In the manifest.webmanifest file we are adding the mini-SDK version to 21 and we are adding assetlink.json file in www folder with the sha256 fingerprint signature and restarting the server. Even though we are facing same problem.

Could you please help us to remove v1 signature from PWA and assign minisdk version to 21 for android?
Thanks in advance.