Make sure to drag the tail down to "hips" under your heicharcy, open the SPECIFIC armature for the tail (not your regular model) and go to the different options until you see the phys/dynamic bones for your tail. if they're not already added, you can add them with the different parts of the tail pretty easily. set the radius to 0.003 or 0.004 and you don't usually have to mess with anything else. you can enter game mode and wiggle around your character to see if it works which is by the top of your screen. Professor Cheese,
Shinebrightqt

you can also just use this video https://www.youtube.com/watch?v=7e2-ibthFE4&t=338s

Professor Cheese,
Nevermind, Now i just need to figure out the dynamic bones

Everytime I import the tail it imports perfectly but the texture I assume shows up as an image instead of it being an actual material

can you tell me how you set up the Dynamic bones,

Bazzi,
POIYOMI

shaders used??