Uneven slab around sewer pipes-Is this normal??

Keen to see the photo of this.
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Hope this helps!

newpie i'ts a common practice to trench out around waste pipes leaving the concrete lower than then slab.
The reason for this is when the wetseal is applied and the puddle flange is fitted to the waste pipe it doesnt sit higher than the slab. Then the tiles can sit nicely over the top.

Thanks for the helpful replies. I have now edited my post to add the photos. Please have a look and let me know what you all think?

Thanks

Looks normal to me - generally wet areas are slightly lower than the main slab. I assume to make it easier for the tiler to slope the run off to the drains.

Handy tip i learn't the first time i built. If your curious whether something is right or not, have a browse of other slabs around the area. If it's the same on alot of them, then likely normal. If not question it with your builder. Of course if you have any doubts def worth asking the question anyway!

Thanks a lot everyone for replying and providing your valuable input which has put my mind at ease ☺.