I'm new in using ArcGis online, so sorry if the question is too simple.
I'm looking for a way to download the results of a Lasso/polygon marking.. Then I'm using the Marking tool in the map, I see that xx results is fetched by the marking, but its not clear to me, how these can be extracted.
I assume you are using the Select widget.
Click Create Layer to create a new graphic layer on the map. You can turn it on and off in the Layer List widget.
Please check the below link for more details.
Let me know if your issue is different.
Export feature is not yet available in ArcGIS Dashboard. You may want to upvote the following idea.
Meanwhile, you could use Web AppBuilder. Checkout the Dashboard theme.
As per the announcement, Export Feature could be made available in future release of ArcGIS Experience Builder in 2021.
"...Export data from the table is under our consideration in the 2021 roadmap, along with other WAB like widgets. The Chart widget is in the plan of Q1 2021 currently."