According to Riot Games’ announcement, Chat Voice will return to LoL Wild Rift in the 3.0 update, first testing in the Americas region.
After some unexpected problems in the 2.4 update of Chat Voice LoL Wild Rift, now this feature will be restored to serve players.
Voice Chat will be gradually updated by region, first in the Americas region in update 3.0. To ensure this feature will work smoothly and stably.

If an issue is detected during the beta, Riot will fix it before rolling out the feature globally. Besides, because some quality or performance glitches will still occur, Riot temporarily calls this a beta test until it is sure that everything is working as expected.
The return of Chat Voice is a good signal for gamers, it will help connect gamers more