m0useanswered grow question 3 years ago I don't see a problem with the "trunk" touching the medium.
If anything it may drop more roots down from that area, very much like a tomato.
Could be a bonus opportunity to make a large root mas in a short period of time.
The main issue you will have is the leaves getting splashed and exposed to wet condition.
This is how a lot of soil/substrate based diseases are spread in plants.
I would pluck the lower leaves when it's bigger and water carefully till this can happen.
Best Of Luck!