https://www.torahmusings.com/2023/11/rav-moshe-feinstein-and-the-history-of-thanksgiving/
Nevertheless, Sokolow correctly points out that thanksgiving is indeed a Jewish value. Without resorting to invented traditions or ahistorical myths, Jews express gratitude to God every day in prayer. Much like Mother’s Day and Father’s Day, which cohere with the Jewish value of honoring one’s parents, Thanksgiving reflects ideas in our own texts and traditions. As Rav Moshe reminded us, American Jews should express gratitude for the religious liberty we have enjoyed in America. May it be God’s will that America continues to serve as a safe haven for Jews.