In Poland as recently as June 2022 we had a first female mainstream ass spanking gala organised by some Fame MMA type promotor. I think they had 4 or 6 female contestants coming from female beauty Instagram world.
You can find some useful promotional stuff on youtube by searching: slap ass fist universe. The contest is behind a paywall so not much had leaked onto youtube.
The contest was won by DAGMARA SZEWCZYK
https://www.instagram.com/dagmara_szewczyk/The losers derriere looked like this, the lower pic is the day after:
https://i.wpimg.pl/828x0/filerepo.grupawp.pl/api/v1/display/embed/f5004121-26b9-44a5- acf2-2a68ac238fef