At Interactive Brokers, directly on the Nasdaq. As a European, you are not allowed to buy the ETF, but you can write options on it and have the ETF booked through it.
Now we in Europa can buy the JPMorgan Global Equity Premium Income. Which is the European counterpart of the US one you ask about. Ticker symbol in Switzerland and UK JEPG, in Germany (XETRA) JGPI. $JEGP started on the 30th of November 2023 (the ticker symbol on GQ is different from the ones on the stock markets!). And it is a monthly dividend payer (also because it uses derivatives, like covered calls, to gain extra income)