Vodafone is one of Europe's largest broadband operators, offering FTTH in Germany, Italy, Spain and Portugal, cable in Germany (Vodafone Kabel) and CityFibre / Openreach FTTP in the UK. Plans and real speeds vary widely by country and access type.
Vodafone Kabel nodes are commonly oversubscribed. Open a Störung ticket citing peak-hour speed graphs, escalation often results in node-split work.
The stock router is mid-tier. Disable Wi-Fi and use a dedicated mesh; Wi-Fi 6 is a noticeable upgrade.
Fixed wireless depends entirely on signal. Move the device to a window facing the nearest mast and run the test again.