I filed the same complaint at the Austrian data privacy agency and asked them to coordinate with the Irish one. You should do the same in your European nation.
I am the head of a large banking app / web in Europe. We have about 40 MiO logins per month, 39 (edit: millions) are done with the app.
Personally I would prefer the web version of everything important like banking always - but the customers are all preferring apps. So yea guess where I allocate my budget.