This may be different than the best first guess to set a human – even the best human wordle player – up for their best second guess. I would be interested to see studies that took into account the most likely trees of guesses off of the first guess that wordle players use and see if the best first word changes.
https://www.reddit.com/r/wordle/comments/zzrakp/what_is_the_best_starting_word/