This is what a mechanical keyboard without a PCB looks like : r/cableporn
BT60v2 - 60% Wireless Hotswap Tray Mount PCB with RGB underglow and wh – Upgrade Keyboards
GK64 GK64xs Bluetooth Keyboard Kit with Hotswap PCB | Flashquark Mechanical Keyboard Store
PCB – KBDfans® Mechanical Keyboards Store
PCB – KBDfans® Mechanical Keyboards Store
Custom Mechanical Keyboard PCB Design Service – customMK
The Best PCB for a 60% Keyboard - Switch and Click
Amazon.com: YMDK GH60 64 Minila PCB Fully Programmable QMK VIA Underglow RGB Type C Connector for DIY Mechanical Keyboard Poker Faceu HHKB Support LED (Black QMK Underglow RGB) : Electronics
60% hot swap keyboard PCB, 64 keys hot swappable mechanical keyboard PCB
Keyboard PCBs: How to Build Custom Mechanical Keyboards
DZ60RGB V2 60% Mechanical Keyboard PCB (KBDFans)
Amazon.com: bm60rgb bm60 Poker RGB 60% gh60 hot swappable Custom Mechanical Keyboard PCB Program qmk Full RGB Switch underglow Type c (BM Poker PCB Only x1) : Electronics
Designing an Open Source 60% RGB Backlit Keyboard
BM80 ISO bm80rgb 80% rgb hot swappable Custom Mechanical Keyboard PCB – KPrepublic
Low Profile 44 Keys RGB Keyboard PCB with a RP2040 from BlueMicro on Tindie