I am not quite sure what you mean, if you mean during the scan: on the battle log window while it is displaying you can set it up to either be timed wait or input wait (player must press button to progress past the scan info so they have time to read it all).
If you mean after the scan can the player view the information again, this plugin does integrate with [CGMZ] Encyclopedia to require the player to scan an enemy to discover it in the bestiary, which can be viewed in battle later or in the map / menus.
Viewing post in [CGMZ] Scan for RPG Maker MZ comments
Yes, you will need to use a plugin that can add custom commands to the battle command window to add the encyclopedia, I have [CGMZ] Battle Command Window but I am sure there are others as well. The JS for the command is in the encyclopedia plugin documentation.