Hi @shrey_batra and welcome in the MongoDB Community !
Depending of the rights the Atlas user has on the dashboard, it can be able to edit the charts or not.
But if your goal is to just see a few Charts or even a dashboard from your phone, I would just create an App in the Atlas App Service, activate the hosting feature and create a tiny HTML page in which you can embed the iframes of the Charts / dashboard from MDB Charts.
In this blog post you have an example of how to make it dynamic but they also explain how to just embed a chart:
The steps and solution you mentioned I do that already
I was hoping to have some type of custom query tool / chart building tool on phone so that we can pull up adhoc results on the fly, without opening our laptops or building the static html page.
Well I think this is a nice feature request for the team. You can submit it here in the Charts section. If you get enough votes, it’s probably the future!