Refer to the screenshot, please.
If I have gotten the APK file, how to verify the signing certificate on the APK matches the mentioned SHA256 fingerprint?
apk files are just zip files which you can unzip them. after unzipping the apk, find the CERT.RSA
file in META-INF
folder and run this command
keytool -printcert -file C:\Path\To\CERT.RSA
in its output you can find the SHA256 fingerprint