Notably, N26′s crypto service doesn’t include support for custodial wallets

Its a Bitcoin IOU. Stay away from this crap. And even if they did allowed you to convert those IOUs to real bitcoin...

The feature is powered by Bitpanda

Oh look its the most toxic and overcompliant bitcoin exchange available for Europe. https://blog.bitpanda.com/en/why-do-i-need-to-disclose-the-origin-of-my-funds-as-a-bitpanda-user

It probably goes without saying but stay the fuck away from crappy IOU shitcoin casinos like Bitpanda, Revolut, N26 etc.