[Feature Request] Ability to make keyboard LEDs light up when the `FLOW_TAP_TERM` has passed

Feature Request Type

• Core functionality
• Add-on hardware support (eg. audio, RGB, OLED screen, etc.)
• Alteration (enhancement/optimization) of existing feature(s)
• New behavior

Description

I defined FLOW_TAP_TERM as 200, which makes it so that if I tapped a key 200 ms prior, any key press of a tap-hold key is treated as a tap. It would be very useful if there was a feature that allows you to light up the keyboard’s LEDs/RGB immediately when flow tap is no longer active, so that I know exactly when I can use tap-hold keys again. This would be especially useful when switching between fast typing and using keyboard shortcuts, for example in a text editor. I don’t know if this is currently possible by defining a function in keymap.c, but based on the tap-hold documentation I don’t think it is.