Google Play Store is not installed on the Huawei P40. You may be able to side-load this application using internet tutorials, but I highly doubt that critical banking applications should be run on a system that does not offer Google Play Store functionality. I would recommend you consider buying the Poco F3 5G phone, it closes less than half the size of the P40, has all the Google Play Store functionality out of the box.
The Poco F3 also has G5, the same RAM and storage and the AMOLED screen has 120 Hz. CHF 399 at Digitec.
Xiaomi Poco F3 (256GB, Deep Ocean Blue, 6.67", Dual SIM, 48Mpx, 5G)
Alternatively, if money is not an option, you can also buy the Mi 11 5G. 799 from Digitec.
Xiaomi Mi 11 (256GB, Horizon Blue, 6.81", Dual SIM, 108Mpx, 5G)
Both phones are much faster than the P40.
