Deutsche Bank and Postbank have rolled out Wero, a pan-European digital payment app that acts as a sovereign digital wallet for instant account-to-account payments, including peer-to-peer, online, and in-store
Außerdem überwachen die Server die Sicherheit der „Tap to Pay“-Geräte so, dass sie mit dem CPoC-Standard (Contactless Payments on COTS) des Payment Card Industry Security Standards Council (PCI SSC) kompatibel sind und PCI DSS einhalten.
Not sure about “dangerous”, Mastercard and Visa have to comply with PCIDSS…
I’m not sure if Google and Apple do…
Yes they do: https://support.apple.com/de-de/guide/security/sec72cb155f4/web