Franky Shogun get actually take damage by Baby5
It was a team attack from Buffalo + B5, it was a small cut + sharp attacks are different from blunt damage in OP.
And that an old feat from Punk Hazard anyway, if PH was anything to go by Sanji would get murderstomp by any commander and we know that's not the case. But if you want to argue that B5's AP > Big Mom physical strenght , feel free to do so.
Also I don't get why you keep bringing Franky down playa after seeing his current portrayal during the raid. Hell even Mama looked a bit intimated by the radical beam (Whether she would have tanked it isn't the point). Problem is that you can't see Franky having a chance against a topi roppo because you keep scaling him over old stuff (Knowing that those were either gag fights or him not fighting seriously) when he's the 5th strongest fighter in the crew. Topi Roppo ain't weak but Franky isn't painted as being a pushover either