From Google? No, they never share the key.
So there's no way to even get the signing key anymore? You could distribute the google apk via nostr:nprofile1qqs83nn04fezvsu89p8xg7axjwye2u67errat3dx2um725fs7qnrqlgpzpmhxue69uhkummnw3ezumt0d5hsftatcy or does zapstore not handle AABs well?
Discussion
They used to not get the key, then they "allowed" devs to share the keys with them, then they suggested/pushed for that and now, for new projects you don't even get the option to sign dev-to-client yourself.