Currently deltaXds can only be configured via kuma-cp.yaml or env var KUMA_EXPERIMENTAL_DELTA_XDS, but there's no corresponding Helm value under experimental: section.

The config exists at:

• pkg/config/app/kuma-cp/config.go
• pkg/config/app/kuma-cp/kuma-cp.defaults.yaml

Should be added alongside other experimental flags like sidecarContainers and inboundTagsDisabled.

Found during Test Friday 2026-04-24.