Perhaps:
https://tracker.pureos.net/T286
But, I’m sure an app dependant on google’s gubbins won’t.
(Perhaps you’re getting an Android-based OS confused with a GNU/Linux based OS - which they both are.)
Also, I can see the need for a bank to maintain it’s reputation and I can see that might require tighter control over it’s banking system than releasing signed apps into the wild might provide - so, figured the amazon appstore might provide a suitable distribution channel.
Anyway, I’m beginning to retrace my steps: