That's a topical issue. I expect there will be a new announcement in the budget this week about incentives for CCUS.
If the incentives are financial in nature and they favour one sector over another, then they constitute a subsidy. Whether the government would consider them inefficient or not, I do not know. Presumably they would not consider an instrument they're just about to roll out as an inefficient fossil fuel subsidy. Otherwise, they wouldn't be doing it, in light of their commitment to phase out inefficient fossil fuel subsidies.