In cross-cultural communication, it is true that differences in cultural backgrounds need to be taken into account when understanding and interpreting the behaviors, expressions, or gestures of others. In Korean culture, mature beauties give you sympathy (usually through gestures) and smiles, most likely as a friendly, affectionate, or even appreciative expression. This behavior is seen in many cultures as a positive, positive social signal that the other person has a crush on you or is happy with your presence.
However, when it comes to the meaning of "very optimistic about you", more context may be needed to accurately judge. Because comparing hearts and smiles in themselves are not directly equivalent to "optimistic" or "acknowledging" your abilities, talents, or potential, they are more of an emotional expression. But if this mature beauty is giving such a reaction after you have completed a certain task, demonstrated a certain skill, or achieved a certain achievement, then it is likely that she is expressing appreciation and recognition for you in this way.
Korean culture emphasizes respect, politeness, and humility, so even if the other person thinks highly of you in their hearts, they may not say it directly, but indirectly through smiles, nods, clapping, etc. Therefore, when interpreting the behavior of mature Korean beauties, we need to observe and understand their intentions and emotions more delicately and sensitively.
Regardless of whether the other party directly expresses "bullishness" about you, we should maintain a humble and confident attitude and continue to strive to improve ourselves to better cope with the challenges and opportunities ahead.