King Charles has not stripped Princess Beatrice and Princess Eugenie of their royal titles. While he has officially removed all royal titles,

honors, and privileges from Prince Andrew due to his controversies, Beatrice and Eugenie retain their status as princesses under King George V’s 1917 Letters Patent. This document ensures that male-line grandchildren of the sovereign keep their royal titles regardless of their father’s status.
Both princesses continue to hold the style “Her Royal Highness” and remain in the line of succession. However, they are considered non-working royals and do not receive full financial support from the Crown. The decision reflects an effort to streamline the monarchy while respecting established royal protocols and the princesses’ own roles outside traditional royal duties.
This clarification comes amidst rumors and calls from some commentators for them to lose their titles, but so far, Buckingham Palace has kept their royal status intact.