I’m sorry this happened! I can verify that there is no rule to access anusvara at this time. I’ve created a Github issue to address this here:
We will try to notify you when the keyboard is updated.
Could you please make the necessary changes to the feature request?
Sorry for the confusing message that I created. Although both the symbols are basically the same, the way it is represented in Malayalam and in Vedic Sanskrit scripts are totally different.
Sorry for misunderstanding. It looks like if you type a\ it produces avagraha?
Can you try that and see if it’s what is needed? Perhaps we just need to document it better.