No, I’d you don’t have tax residency in Germany, you don’t pay income taxes in Germany. Independent of citizenship.
Only the US and Somalia levy income tax on non-resident citizens.
Only the US and Somalia levy income tax on non-resident citizens.
Only for public servants working and living abroad German citizenship is relevant when it comes to taxation (this concerns mostly diplomats and such).
This is not true and dangerous advice to follow. For Canada, see: https://travel.gc.ca/travelling/living-abroad/taxation