It’s a gatcha game that goes through the main stories of the previous FF7 games, while also including new stories from The First Soldier, And other stories planned from other games like Before Crisis. It’s not full games, you essentially play little missions where you go through the key story point in those games.
I tried it out for a little bit, but the story pieces were a little too bite size for my liking, and I absolutely hate gatcha mechanics, so it’s really not for me personally. I’m not interested in dressing up my character in outfits or leveling up my gear.