Follow this guide: https://techbeasts.com/install-twrp-recovery-root-galaxy-j2-prime-grand-prime-plus-g532f-g-m/ but use Universal TWRP and SuperSU instead. Use same no-verity-no-encrypt_ashyx.zip to disable forced encryption on first boot.
6.0.1 din etong Galaxy J2 Prime. Flash ko Official firmware using Odin tapos TWRP using Odin din. Pag may TWRP na yung cp pwede na dun sa cp mag flash ng SuperSU at "no-verity-no-encrypt_ashyx.zip" eto yung mag disable sa auto verify at encrypt ng device sa 1st boot kaya blocked mag root.
need mo fresh install firmware bago mo gawin dapat di pa naka enable yung veryfy at encrypt stage ng phone na gumagana pag nag boot na sya normally. need ρá†ch no-verity-no-encrypt_ashyx.zip bago mag normal boot para ma disable sya. need magboost sa TWRP after install ng new firmware