I use the same software I use for real flying on an Android tablet and phone, for both flight planning and as a back up for the GPS in whatever plane I’m renting, and for accessing approach plates and supplemental (AF/D) data. It’s called Avare and I wrote step by step instructions for connecting it to MSFS 2020 here. There’s bunches of videos on using the EFB on YouTube.
It has free access to sectionals and all available aviation data (IFR charts, approach/departure/arrival plates, AF/D data and much more), although, they would appreciate a donation if you use the software regularly to help maintain the aviation data which they keep up to date.