$__range

The Prometheus/Grafana `$__range` builtin variable doesn't seem to be supported.
My converted Grafana dashboard result in the use of in something like:
`sum(increase(metric[$__range]))`

This won't give any data as `$__range` is not understood. I don't want the `${__interval}` as I want to sum over the entire selected time range in the dashboard.

Can I manually correct this or is this simply not possible in GKE using PromQL