Is RBF Replaced by Fee?

The concept of RBF replaced by fee and that is basically giving you the possibility to increase the fee that you attach to a transaction. I was in El Salvador recently and they had this school children's course for Bitcoin and it was called me prima Bitcoin. And as part of their tests they had to create a moon wallet right and create right down the the backup from that and then recover a backup into blockstream green, spend out of block stream green into that moon wallet so you know they had to actually use blockstream green as part of that process. It's an interesting one that and the idea is that they're hoping to roll that program out to more and more schools if they can