Recent advancements like Winlator allow you to run the actual Windows PC version of NFS MW 2005 on Android. This is the holy grail because the PC version has higher resolution textures and modern mod support. However, setup is extraordinarily complex.
Community modders have upscaled the PSP textures to 1080p using AI. If you are running the game via (rather than a standalone APK), you can load these textures. Search for "NFS MW 2005 HD Texture Pack PPSSPP" – it replaces blurry car decals and road signs with crisp 4K versions. Nfs Most Wanted 2005 Android Apk Obb