A custom ROM fixes all of this.
Power users. Evolution X packs every feature imaginable. You can change the QS panel layout, add a kill button to notifications, and customize the lock screen clock fonts. Oppo A91 Custom Rom BETTER
⚠️ : Unlocking the bootloader on Oppo devices is harder than most brands. Oppo restricts it. Read the “Bootloader Unlock” section carefully. A custom ROM fixes all of this