It's going to take many months or a year before Ukraine has regained control over Donbass, and rebuilding the damage that Russia has done will take years. Energy infrastructure will undoubtedly be a priority both because it's needed for the Ukrainian people themselves, and because it's an immensely valuable cash export to stabilise their economy.

But no, it's highly unlikely to be contributing to European exports next year.

Once it's producing, however, Russian markets in Europe are gone forever.

Ireland equivalent : https://www.smartgriddashboard.com/#all

52.75% powered by wind. The record in Ireland is ~75%.

https://en.wikipedia.org/wiki/Natural_gas_in_Ukraine

It's got over 1,000bcm of proven on-land reserves, with huge additional resources in the Black Sea and Sea of Azov.

Once the regain control of they Donbass producing that gas and oil will no doubt be a major part of their recovery plans.