The time of deforestation of Europe is a few decades behind us, I think. Certainly in the EU, forest areas are growing slowly (by about 10% since 1990, according to https://ec.europa.eu/eurostat/statistics-explained/pdfscache...)

I don’t think the forests will (soon) return to what was there in Roman times, though. There’s a lot less, and of lower age (I don’t think Caesar’s men would find it as easy to find the huge trees they used to build a bridge over the Rhine in today’s forest as they found it two thousand years ago)