OneWeb is/was lanuching with Arianespace. But Arianespace basically does not have any rocket anymore. A few Ariane 5 left with an uncertain Ariane 6 ramp-up, no more Soyuz, an probably very few complete Vega until Ukraine is back to work.

From the Arstechnica article posted above:

> Europe has no spare launch capacity, with all of its remaining Ariane 5 launches spoken for, and the Ariane 6 rocket is probably at least two years away from having operational capacity.

Launching with China is more likely, as they can ramp up capacity in two years for far less money and timeline risk. The Indians, too, could theoretically reach the orbits that OneWeb needs but with far fewer sats on each PSLV. OneWeb is partially owned by an Indian firm, so though it would be more expensive there could be other advantages.

More likely than either is to put the OneWeb birds on a Falcon 9.

The article states they have no capacity available