I have an iPhone XS but somehow water got inside it after getting it wet, I can see water inside all the camera lenses but it’s been days of leaving it in rice and the water still hasn’t come out and my iPhone is not working properly

Nowhere has Apple ever stated any iPhone is waterproof.

Apple's official statement is do not submerge your phone in liquid.

https://support.apple.com/en-us/HT207043

Your phone is destroyed.

Any warranty is voided.

You will have to buy a new phone.

Basically, you can't. Placing it in rice or any other form of desiccant will NOT work and is a widely spread Internet myth. Even if the water evaporates, it may still leave residue that can cause electrical shorts.

At this point, you need to stop using the phone as any further use may cause more damage. Apple will not repair liquid-damaged phones. Your only option if you want it repaired is to take it to a third-party that specializes in this type of service. Note that if you do, your phone will not be covered by Apple.

If you elected to obtain an AppleCare+ plan with this phone, your phone may be eligible for repair/replacement at a reduced cost as one of the two accidental incidents.

It's not waterproof.

Make an appointment at the Genius Bar of your local Apple Store and get an out of warranty replacement.