Why note 10 plus has started charging slow? Is it because of the update? Samsung, please take this into account and fix the issues. It is taking a long time to full charge which is bothering all the user perhaps. Or is it because of some any issues with the phone.
Do these help articles assist you? https://thedroidguy.com/fix-galaxy-note10-wont-fast-charge-fast-charging-not-working-1108040 and https://www.technobezz.com/how-to-fix-slow-charging-issues-on-galaxy-note-10/
Let us know which step if so!
You might need to try another charger, cord, or outlet as well!