One of biggest problem with DEX/P2P is lack of local currency. If you don't use USD or EUR, the option would be severally limited and sometimes with unfavorable exchange rate.
What do you think the solution for those people who want to use DEX/P2P but their country aren't accept USD or EUR?
One option is create order on certain DEX/P2P with their fiat currency, but it could take long time before someone interested with your order.
is there such digital bank that accept every currency and the fees is worth to use?
Every currency? I doubt such bank exist, especially when there are various sanction going on. Although you could use overseas account which offered by some bank which should support SWIFT/international wire transfer. But take note SWIFT is rather slow and your bank might have unfair exchange rate between 2 fiat currency.