Path:
realme UI 7.0 & 6.0: Settings > Accessibility & covenience > Process manager to view which app is using how much RAM in your realme mobile
realme UI 5.0 & 4.0 & 3.0: Settings > System settings / Additional settings > Process manager to view which app is using how much RAM in your realme mobile
realme UI 2.0 & 1.0: Settings > Additional settings > Process manager to view which app is using how much RAM in your realme mobile
realme UI R & Go & S & T & U Edition: not supported
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How to adjust a dedicated RAM for games