Keyboard sound fluctuating

So I’m using an iPhone XS with the latest iOS 15.5 but the issue is that whenever I type something, it normally has a low sound and sometimes it gets louder and louder on its own like with random patterns, especially when I’m typing something and some notification arrives so the keyboard sound will go as much higher as the notification and as long as notification stays it keeps typing at high level, same happening with the lock sound, If someone has this issue or got a solution lemme know