Possibly the smallest keyboard I can use: the GameNote (aka Havit KB512L) : r/MechanicalKeyboards
HAVIT KB500L 60% Mechanical Keyboard with Hot Swappable Brown Switch,
Amazon.com: GAMENOTE 60% Mechanical Keyboard, Wired Gaming Keyboard LED Backlit Mini Compact Keyboards Blue Switch 71 Keys Type-C for PC Gamer Laptop Computer : Video Games
Gamenote KB866L Multi-function Backlit Keyboard
KB473L Backlit Mechanical Gaming Keyboard - HAVIT
GAMENOTE KB890L 87 KEYS MECHANICAL GAMING KEYBOARD - BLACK
Amazon.com: GAMENOTE 60% Mechanical Keyboard, Wired Gaming Keyboard LED Backlit Mini Compact Keyboards Blue Switch 71 Keys Type-C for PC Gamer Laptop Computer : Video Games