I tried to look it up but the Samsung site is stalling too long for my patience, but as far as I know a Samsung A6 tablet runs on Android. Photoshop Elements was designed for Windows. So... no, you can't run that on your tablet. There is a smaller Photoshop lite version available in the Google playstore, that should be doable, but anything beyond that won't work.
Simply put: if it's not available in the Google store then it won't run on your tablet. *
* This is technically not 100% true because you can "side-load" individual Android apps, but that's beyond the scope of this post; it also doesn't change anything regarding my comment.
As for using your Galaxy A6 tablet as a graphics tablet (instead of a Wacom or similar) in conjunction with running PSE 2020 on Windows, yes, it's possible but it's really an unsatisfactory hack. OK if you're a beginner or perhaps in an emergency.