But we don't have anything like FF as an alternative to go from Android. Especially considering banks require "certified OS".
https://grapheneos.org/releases
(Pixels only)
Go for Calyx or any other android distro, they have zero difficulties in supporting more devices.
The last cellbrite leaks show it as more secure against attacks from le than the current iphones, and that's more important to me than abandoning google hardware.