1yr timeline is ambitious if it means fully deployed. Clearly the right thing for Sweden and others to do. Also worrying that even 3yrs into the Russian invasion, bordering countries are urgently increasing their preparedness for future conflicts.
The standards are already designed and widely implemented in Europe and a smallish percentage of transactions are already fully offline. I suspect this could be implemented with just policy and config changes, with no need to reissue cards or deploy new readers.
Payment terminals might be trickier as we've observed during outages that they currently don't fall back to offline transactions. But their software and business rules can obviously be updated.