I think these leaks are somewhat confirmed
https://serebii.net/pokedex-swsh/icon/898-i.png and
https://serebii.net/pokedex-swsh/icon/898-s.png are empty images, probably waiting for hi-res sprites instead of redirecting to 404 error page, which happened for example for
https://serebii.net/pokedex-swsh/icon/899.png