By no means have any professional background when it comes to tile other then from a decorating point of view. With that said as far as I know yes. New product's have have now made it easier to lay tile, and other types of flooring over existing tile.
You can always call them and ask too
Yes, in some cases. Google is your friend. https://www.familyhandyman.com/tiling/tile-installation/tile-installation-how-to-tile-over-existing-tile/
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