Is there a way to push a helm chart to ECR?

ECR has added the ability to host oci artificats which includes helm - Amazon ECR

I am not aware of an existing plugin for pushing helm charts to ecr (is that what you are looking for?) however, there are existing helm plugins in our plugin registry. If you are unable to find a suitable plugin you always have the option to create a custom plugin (see docs.drone.io/plugins/overview) or you could just add a step to your pipeline that executes the necessary shell commands.

thanks @bradrydzewski

That I can do, how does one load a custom plugin will it just load images from docker hub ?

That I can do, how does one load a custom plugin will it just load images from docker hub ?

yes, a plugin is just a docker image (from any compliant docker registry, including dockerhub) where the container entrypoint performs a pre-defined task. here are some useful links:

https://docs.drone.io/plugins/overview/
https://docs.drone.io/plugins/tutorials/bash/
https://docs.drone.io/plugins/tutorials/golang/