don’t tile over them. If the concrete has sunk to the level of the surrounding soil, you’ll have to do some grading. Water must not pool on the tiles. So the slab’s surface has to be made flat.

Yes, you can lay engineered-wood or laminate flooring over tile if the tile is in decent ... At no time would I ever dig into the concrete slab below; there is no need. There are scraper blades ...