The developer of the SponsorBlock fork (often maintained by TeamNewPipe contributors and Polyzoid for SponsorBlock integration) does upload to the Google Play Store. The only legitimate source is:
Build from source using GitHub Actions or obtain the APK directly from the fork’s GitHub Releases page: https://github.com/polymorphicshade/NewPipe/releases/tag/v0.27.6 download newpipe sponsorblock v0276apk 11 fix