It looks reasonably spectacular, this photo seems to show some ash falling from the cloud:
Photo from Geonet site https://www.geonet.org.nz/volcano/cameras/whakatane
It's settled down since then to what looks like typical White Island activity. Hopefully nobody was near at the time.
In case there's doomsday forecasts, almost certainly nope. AFAIK White Island has no history of having violent eruptions, just a lot of episodes like this one.