In Nordea, they aren’t showing up—at least not in the place mentioned in the messages, neither in mobile nor in online banking (Invest / Corporate Actions). Not really a surprise, but hopefully they’ll appear there eventually.
Edit: worth mentioning that my holdings were A-shares, and the subscription rights do appear on the list if/when selling is of more interest than subscribing. That might affect whether there’s a bug with how they show up (a slick “vibe-coder” only tested the B-share scenario or something).