Hi Marta. It’s good to interact with you again.
Well… that probably depends a bit on what matters to you. Creation out of nothing has been a part of Christian orthodoxy for a very long time. When the Nicene Creed (the gold standard of historical orthodoxy says: “We believe in one God, the Father almighty, maker of heaven and earth, of all things visible and invisible” it’s making a statement that everything God made (however he did it) was made from nothing. This is similar to ‘plain reading’ interpretation of Hebrews 11:3 (NIV2011):
By faith we understand that the universe was formed at God’s command, so that what is seen was not made out of what was visible.
All this is to say, that whilst orthodox Christians have historically disagreed and vacillated about how God made everything out of nothing (YEC v ID v OED v EC, etc.). Generally, they have always agreed that the it was from nothing.
That said, whether one accepts creatio ex nihilo or not, neither positions is not without objections. The biggest objecting to creation out of nothing is summed up in the phrase ex nihilo, nihilo fit. That is, out of nothing, nothing comes. In other words, since God cannot do what is logical impossible (like make a square circle), and creating something out of nothing is logically impossible, it is therefore impossible for God to create everything from nothing.
However, those who argue for creation from nothing might reply: Where then did that matter come from? If matter like, God is eternal, then this detracts from God’s uniqueness and therefore his God-ness. Or that creation from nothing is only logically impossible for created beings.
TLDR, neither position is unassailable from a theological perspective, but CxN has been the traditionally orthodox theological position. Personally, I would be remiss to let go of that without compelling evidence. But that is me.