keyboard lag

I own an iPhone 15 Pro Max running iOS 17.2.1, and I've been experiencing keyboard lag, particularly on WhatsApp. This problem isn't new for me; it persisted on my old iPhone XR. Despite upgrading to a new iPhone, the issue persists.

For example, when typing "hello," only 'h' appears initially, followed by a brief lag, after which the remaining letters appear together. This problem occurs intermittently while typing on WhatsApp, and it has been quite annoying. I'm curious if others have been facing the same issue recently and how ti fix this issue.