Iphone Xs TrueDepth Camera repair

Apple's philosophy is to replace the phone for an out of warranty fee (Other Damage) then remanufacture your phone for someone else. The teseller should offer that service if they are also an approved repairer, or send it away.

https://support.apple.com/iphone/repair/service

or: contact Apple Support 

Anything other than Screen or Battery may be a replacement phone and the price is in the article.

You can see additional service information within the following article:

Prepare your iPhone for packing and shipping

Apple clearly has repair parts available for this sort of thing. They even mention camera repair. It's obvious that it should be possible to simply replace the camera and reset the system.

About genuine iPhone cameras - Apple Support

If you need to replace your iPhone camera, it's important for certified technicians who use genuine Apple camera parts to repair it.

Apple has also announced a self-repair program, although the exact details aren't known, such as how to deal with all these messages that occur unless Apple's proprietary equipment is used to clear them.. However, they clearly mention cameras.

https://www.apple.com/newsroom/2021/11/apple-announces-self-service-repair/

The initial phase of the program will focus on the most commonly serviced modules, such as the iPhone display, battery, and camera. The ability for additional repairs will be available later next year.

However, how whether or not a camera can be replaced by an AASP on the same device is another matter. I've called up an AASP in California and asked about it, and I was told that they could only replace the entire device serving as an agent and not actually replace just the camera component and return it back.

That article refers to the camera used to take pictures not to the True Depth camera which is separate. Apple announcing self-service repair for the iPhone 12 and 13 does nothing for the OP since they don't have either model and the program is not yet in place.

We can't discuss 15.4 beta but I can tell you it is more than a few days off.

I can tell you that because of the security aspects it cannot be repaired except by Apple or Apple certified repairer, and if they have such a presence in Israel they will/would exchange the phone for the price I indicated in my first link.

I withdraw that price reference, like India there is no fixed price structure in Israel.

https://support.apple.com/en-il/iphone/repair/service