Tomb of Annihilation was released a long time before we started producing official content for D&D. Since doing so we have concentrated on their new releases, releasing content for Dragon Heist, Decent, Strahd, FrostMaiden and Witchlight on the day of release of those books. As much as we would love to be able to cover all of the older D&D titles, doing so would mean that we can’t cover the newer material.
With that said we have over 600+ soundsets currently in the fantasy catalogue, many of which work wonderfully for Tomb of Annhilation. If you are looking for something in particular then ask on the SoundSet Suggesions thread here on the forums, I am certain you will get some inspiring replies of which sets to use for any particular scene.
And if you have a Supersyrin subscription then you will have full use of Syrinscape Online and the Creator, which means that you can tailor any of our soundsets to match what you need or build your own. Tomb of Annihilation would make for a fantastic piece of Community Content.