iPadOS 27 has indeed changed the visual aspects of how the battery-charge percentage is displayed. The current iPad representation is now, arguably to the iPad's detriment, consistent with the how the battery charge status is displayed on recent models of iPhone.
You are not the first - and are unlikely to be the last - to complain of difficulties reading the new combined graphic.
Prior to iPadOS 27, the battery charge percentage, if enabled in iPad settings, was clearly shown adjacent to the graphical representation of battery state at top-right of the screen. As you correctly observe, iPadOS 27 changes the battery charge presentation to show the percentage within the battery graphic - this this being visually less clear than before.
This behaviour is not configurable.
Contributors here are all end-users, just like you. Other than the site Moderators, Apple neither monitor nor participate within the Support Community. As contributors, we have absolutely no influence with Apple or its Development Team.
Apple does invite submission of constructive comments and feature requests via its Product Feedback portal. If you would like to see additional configuration options or changes in a future release of iPadOS, this would be the most appropriate channel through which to submit your request:
Feedback - iPad - Apple
While you are perhaps unlikely to receive an individual reply, we understand that all feedback is logged, analysed and forwarded to the relevant Apple Team(s) for consideration.