Apple's iPad Pro is advertised as a worthy substitute of your laptop but there's one thing that's holding it back and Apple fixes it with the iPadOS 15. We are talking about the 5GB RAM limit imposed on third-party apps by the OS. Reportedly, this cap has been increased. Some power users, mostly designers and other creative professionals, use demanding apps on their M1-powered iPad Pros so limiting them to use just 5GB of RAM reduces the performance of the said apps. Sure, by doing this, Apple is ensuring that the system would run fluently no matter what apps you are using and reserves...
Source: https://www.gsmarena.com/ipados_15_to_increase_the_ram_cap_for_apps-news-51013.php