"Star-quakes" (more accurately, the excitation of one or more internal acoustic or gravity oscillation modes in a star) are neither tsnunami-like or cataclysmic, and TFA is pure clickbait. In most stars in which they've been detected, the brightness fluctuations they cause are well below the one-part-in-a-thousand level.
They do, however, have the potential to uncover the internal structure of stars, via the technique of asteroseismology. So, the Gaia DR3 release is pretty exciting stuff -- just no need to overhype it with Michael Bay adjectives.
Full disclosure: I am a computational asteroseismologist.