Is it possible to use influxQL in the serverless version using API or client?(IOx)

I created an account on the AWS serverless cloud version, and the version information is below.

InfluxDB Cloud Serverless
Version 2.0.0 (7dc6997)

And I could see from the documentation that that version uses IOx.
In the version using IOx, influxQL is guided to have better performance than flux, but when using NodeJS modules or using HTTP API, only guides using flux can be found.

How can I use influxQL in NodeJS or HTTP API?
Is influxQL only available in Data Explore or Grafana?

Additionally, when will influxDB version 3.0 be applied to my account?