I do not have no seedvault backup with boursobank on it, so I tried ro reinstall it through aurora store.
When I try to log in, I get the error message that the app does not come from the Play store and find myself unable to log in (several attempts).
Then I uninstalled the app and tried the above proposition
Aurora store > settings > install settings > choose microG install program (third choice)
Without success, I could not log in.
I also tried to reinstall boursobank app after modyfing Aurora store > settings > network > google play version > choose latest (third choice) without any more luck.
I cleared boursobank storage before each uninstall/reinstall attempt.
I trided to combine these tweaks with the one that is mentionned earlier in this thread (disabling microG)
I don’t know if it will help but the LineageOS for microG project wiki, now has a page about banking apps. It includes a section on how a user got the BoursoBank app to work by using Shelter.
Happy to hear you you got it connected, but this is a bit strange to sort out. Newest Calyx builds I believe are also now LineageOS based (?? I may be wrong on this??), and also use microG, so they really should be in a similar compatibility situation?
Calling Boursobank and asking them to “retirer mon appareil de confiance” lets you validate transfers and 3D Secure payments using an SMS and email code instead !
It took less than 10 minutes in my case.
Here is a direct link to request a callback from them, which also avoids having to go through the chatbot.
Just be aware that logging back into the app (after the Face ID and identity verification) automatically re-enables the trusted device and disables the SMS/email authentication again.