You'll be asking the same thing by trying to pay through a totally custom phone. As I'm repeating here, the blocker is lack of trust from banks, not technical reasons. THEY have to trust YOU, and then banking apps will work. Otherwise any tricks to get past security check to manipulate your bank accounts will be just short-lived hacks.

If the King of England walked into the Bank of England and wrote a hand-written bond for GBP1k with a bic pen on back of copier paper, they'll take it. Electronic platforms has nothing to do with that. That's why it's stupid to keep asking if banking apps would work.