There's a guardian project app. Same people who make TOR and Orbot. Its called Checkey. Its not been updated on github since 2020 and I havnt got round to testing it myself yet.
Also can't tell you at this point which signatures it checks against. I think its the github ones but it might be the fdroid ones?
Or it might be a different kind of cryptographic signature entirely. Its beyond my scope of understanding right now.
There is no APK for the app on their site but it is on f-droid.
There's also a Linux terminal thing, I forget the name. You could try to achieve that with termux.