No, Investments or Structured Investments you make with Trading 212 are not FSCS protected, I confirmed this from the FSCS website. Please use the link below to do it yourself.
https://claims.fscs.org.uk/PreScreening/EnterDetails?_gl=1*1t0d8sc*_gcl_au*ODg1NTc1ODY5LjE3NDEzNDkyNDY.