The Varmilo VA68M is an excellent TKL keyboard, but the documentation for it can be hard to find. Here is a collection of shortcut combo-key functions.
FN + <
HomeFN + >
EndFN + Right Ctrl
MenuFN + J
Print ScreenFN + K
Scroll LockFN + L
Pause BreakShift + Esc
~FN + Esc
`FN + 1 - +/-
F1 - F12FN + Up/Down
LED BrightnessFN + Right
Toggle LED Breathing ModeFN + PgUp
Toggle number row for R1FN + PgDn
Toggle function row for R1FN + Windows
Windows LockFN + Windows
(Hold until LED flashes) Swap Windows and Function keysFN + Left Ctrl
(Hold until LED flashes) Swap Ctrl and Capslock keysFN + Left Alt
(Hold until LED flashes) Swap Left Ctrl and Windows keys