Hope it might work for reading a HTML but looks like your html returns large amount of data and that could be a problem inside a workflow.
Such a requirement can be easily achieved by a creating a azure function/logic app which would act as a proxy which would call the web page upon a request, process data and respond as a xml/json.
Inside the workflow, you can call the azure function/logic app which would return an acceptable response by the rest API call.
Hope it helps!
Damith
Hi,
As another alternative at least in this case there seems to be an API call to get the data
Its noticeable when we tried to go to the Datachart page