Nigerian gas may close the supply gap, but it will definitely not be a full-fledged replacement, since the EU bought gas from Russia at the best price on the market. Even if the volumes are the same, the price will obviously be higher, which will also be a cause for dissatisfaction
It is difficult to expect that anyone will be able to offer the price of gas that the EU paid (and still pays) to Russia and which is delivered by gas pipeline. Everything that comes by sea is of course more expensive because the gas must be converted into a liquid for transport and then converted back into gas in the LNG terminal.
The EU is looking for gas everywhere, so
Canada has been mentioned as one of the possible partners for some time, although agreements have yet to be reached. However, regardless of all the negotiations, next winter in the EU we will face restrictions, because it is not realistic to fill the underground storage to the appropriate capacity in such a short period of time.