For people without a viable alternative such as transferring their funds to a bank that does not require Google/Apple certified devices, this seems to be the way. The second phone does not even need to have a SIM card in it, except perhaps during set up. That phone does not leave home and is ideally be powered off with its battery removed when not in use. Everything else can be done on a free device, ideally using FOSS apps. Ideally again, this means no Facebook, no Whatsapp, no IoT crapware.
Luckily, here in the U.S. this is still possible. I run Graphene on a Pixel without Play Store compatibility layer and everything just works. Most of my apps come from F-Droid, with the notable exception of Whatsapp, for which a standalone APK is available. Unfortunately, it is proving difficult to get rid of Whatsapp entirely because of friends and family.
Luckily, here in the U.S. this is still possible. I run Graphene on a Pixel without Play Store compatibility layer and everything just works. Most of my apps come from F-Droid, with the notable exception of Whatsapp, for which a standalone APK is available. Unfortunately, it is proving difficult to get rid of Whatsapp entirely because of friends and family.