Best Broker for ETF Investing in Greece? Looking for Advice on Taxes and Platform Choice

Hello, My mother-in-law lives in Greece and has a steady income from several rental properties. She is looking for ways to invest some of her surplus cash, and since I have been investing in ETFs for many years, we're considering whether that might also be a good option for her. I currently live in the Netherlands and invest in the accumulating VWCE ETF through Degiro. One of the reasons I use Degiro is that it simplifies tax reporting, which makes things much easier for me. For those of you who