Barcelona has been interested in signing Zubimendi for years, he was Xavi's primary target when he came in as manager and the player first identified as the desired heir to Busquets. Arsenal has also been very interested in Zubimendi for a long time. He is one of the few midfielders around who really seems to have the passing skills and positional sense to play the pivot 6 for a positional play team. He isn't a jack-of-all trades at all - he's got a very rare skill set that managers who play this styel of football greatly value, like a Jorginho. That profile is very rare, much more so than a destroyer like Ugarte or an all action 8.
There have been several obstacles to these deals, including Barcelona's finances and Arsenal probably not signing another pivot six unless they can sell Partey. But by many accounts Zubimendi simply doesn't want to leave Real Sociedad. I haven't seen any real indication that this has changed.