Google's latest Pixel-series flagship had been released for pre-orders in France, Germany, Ireland and the UK until October 15, 2020. However, this option is now no longer actionable in either of these countries. Similarly, if you are in these nations and want a 4a (5G), you have to join a wait-list.
https://www.notebookcheck.net/Google-runs-out-of-Pixel-5-units-to-pre-order-in-several-European-countries.497597.0.html