In addition some gas-powered central heating plants can be easily converted to use heating oil.
There’s lots of options, but presently....time is working against them, and no one can predict where the Russia war business will end up. Add to this...you have environmentalists trying to hinder anything that is not renewable.
What I do anticipate by December...a lot of regulations in place, and a quarter of society marginally being able to afford electricity (increasing monthly) or their heat. I noticed some news piece over the weekend...’robbery’ of public forest wood now being reported. You can go out into a public forest, with a permit for x-amount of firewood. Reports adding up where people avoid the permit business.