Haven't paid into a pension for 10 years. Pension ALG2 level?

Just a question. A colleague is now 55. She was self-employed for 10 years and didn't contribute anything to her pension. Now she's 10 years short. She won't reach the 40-45 years. She plans to buy more points. I advised her to save and invest, and then live off of them in retirement. I think…

Do you lose your right to a statutory pension in Germany if you lose your German citizenship at some point?

Let's say I worked in Germany for 15 years and accumulated pension points. At 65-67, I can theoretically apply for a pension and receive a small pension based on my points balance. What happens if I acquire another nationality at the age of 40, for example, Argentine or Brazilian, and lose my German citizenship? Will…