I think the Hellish Jungle achievement is bugged or there is no way to tell how many Aberrant Ashes you have to complete this achievement.
Please fix this achievement on Xbox.
I remember when the expansion came out, upon completing Hell Tides on Nahuntu, there was a counter just for this achievement of the Aberrant Cinders you had
Now, it no longer displays this counter, and you don’t know how many Aberrant Cinders you have to complete it.
exactly the achievement is:
Infernal Jungle
Collect 10,000 Aberrant Cinders in Nahantu Helltides.