Verifying integrity of the 1Password 8 Installer

I remember being able to click the lock button in the top right of the 1Password 7 installer and inspect the certificate chain for the cert used to sign the package.

How can I do the same with the 1Password 8 installer? It seems to use a custom installer interface that immediately downloads and installs the program without letting me inspect what certificates were used to sign the code.

Does Agilebits publish release hashes or a PGP key + sigs anywhere that I can use to check the integrity of the package myself?

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1Password Version: 8
Extension Version: Not Provided
OS Version: mac OS 12.4