I don't think Swan is in Austria. Relai doesn't need KYC yet, they still keep records from your IBAN, but they will soon have to due to MiCA legislation so I wouldn't bother. Tell him to avoid any big names, especially if they have a licence in Austria.
Easiest P2P would be nostr:npub15369wu3wzzar5fclhecyqfv683x69n6nhlg7rxqnsg2dydgxflpq3apswl or Vexl. I would start with one of them.