There would have been NO road blocks for extending the lifetime. Westinghouse offered fuel rods which would have been delivered in time.

They had all the normal maintenance (every 2 years) and were in pristine condition, much better than most other nuclear reactors on this planet. Only the 10 year interval was pushed out, but it's just an additional check to further increase safety over the long term. No downtime would have been required, especially no multi-year downtime.

The previous government did not know that Russia was to attack Ukraine and gas flow was about to stop with all the effects on energy availability and prices.