You do not have the YAML (.yml or .yaml) files for your Helm deployments.
How do you find the pod manifests for the yaml files when you do not have access to the Helm repos?
helm ls -a -A
The output will show a "Name" on the left most column and a namespace in an inner column. (To learn more about these command see https://helm.sh/docs/intro/quickstart/ and https://v3.helm.sh/docs/helm/helm_list/.)
Next, run commands like this (but replace "foobar" with the name of the release/deployment you want to view the YAML for and replace "coolnamespace" with a namespace found in the above command):
helm get manifest foobar -n coolnamespace
Another command that may help is this (but replace "foobar" with the name of the release or deployment you want to view the YAML for):
helm list foobar --output yaml
(It was adapted from this stackoverflow.com posting.)