I can't find the /system/media/ folder in any root browser or TWRP File Manager

I'm running Evolution X 4.3 (official) for Samsung Galaxy S6 (zerofltexx) with MagiskRoot and a few Magisk Modules. I was recently thinking about getting a custom boot animation for my phone, so I installed a root browser and looked for /system/media/ but it wasn't there. I also tried the file manager built into TWRP, but I couldn't find it there either. When I tried to use the "Boot Animations for Superuser" app, it ran into an error trying to backup the existing boot animation. If the /system/media/ folder is missing, how am I still getting the default boot animation that comes with Evolution X? Anyways, I just need help on how to replace the boot animation.