Blizzard post on this Forum:
Support article:
Warning!
Deleted characters in the modern version of World of Warcraft can not be restored from July 23, 2024 to a future date that is not yet determined. See this blog for more information. The service will be restored as soon as possible and we appreciate your patience. Blizzard Customer Service cannot bypass this restriction.
link: https://us.battle.net/support/en/article/15312
Blog post: