If you purchased the Tempered Glass version of the North case then your fan hub is not missing. It is not included in those versions of the case. The fan hubs are only included in the Mesh side panel versions of the case. As those versions of
Fractal Design North Build - Step by Step Guide
Jonsbo N2 vs Fractal Design Node 304 NAS Case – Which DiY NAS Case is Best? – NAS Compares
Fractal Design Celsius+ S28 Dynamic X2 PWM Black 280mm Silent Performance Slim R
Pop Air — Fractal Design
Fractal North fan hub question : r/FractalDesign
Works right out of the box – no software needed Choose from twelve color modes, five brightness modes and nine pulse/motion effects. Remembers
Fractal Design Adjust 2 Manual ARGB Controller for All Standard 5V ARGB LED Fans Strips and Devices Chaining Y-Cable Adapter Included
Corsair RGB Fan Hub to Standard ARGB 3-pin 5V Adapter male/female - Sweden
Fractal Design Dynamic X2 GP-14 PWM FD-FAN-DYN-X2-GP14-PWM-WT 140mm Case Fan
X570 Aorus Master F33C REV 1.2 [F33C bios missing?] - CPUs, Motherboards, and Memory - Linus Tech Tips