I just found out that OneNote have very nice pressure support (despite being extremely underdeveloped at least in the handwriting area)
Anyways this is the first app I notice supporting it.
I am yet to find one with tilt support.
Afaik spen is the only active pen technology in the Android world and Tab S3's SPen is the only one that support tilt (or at least claims to).
Also considering the price it doesn't seem to me that this tablet will have a big user base.
For that reason I don't think we will see many applications supporting the tilt anytime soon.
If one day this feature makes it on the Note phones than maybe.
Fingers crossed this line is still alive.