It doesn't matter if you're in Poland, the UK, the US, Brazil, Portugal, Spain, Germany, or anywhere else. As long as you use a high-quality VPN, you can play on bet365 from anywhere in the world.
To create your Bet Builder, you will first need to navigate to your chosen fixture or event before selecting the Bet Builder feature from the header. You will then see all the available markets and your Bet Builder odds will be calculated with every selection.