Welcome! Brifters are about function. A lot of C&V'rs have very passionate feelings against them & carbon so factor that in. A carbon fork on a nice steel frame with brifters & good wheels can make a very nice ride - light, fast & comfortable. If it were mine I'd have to strip the fork and expose the black fiber, then clear it - only so it wasn't trying to mimic the fork you don't have. Given It's not original anyway you have a clear path to make it any way you want or enjoy it as is. Nice find and glad you shared!
I had my 87 Peugeot Tri built with carbon & STIs for a long time - rode great, 20 1/2 lbs as pictured with saddle & pedals.
