Give the gift of focus
Working from home means working next to every distraction they own. The phone sitting three inches from the keyboard.
A spouse, a roommate, a kid wandering in "just for a sec." And no one around to keep them honest when they drift.
It's not a discipline problem. It's an environment problem. Nobody builds a routine when the world keeps interrupting it.
Locked gives your team the one thing an office used to give them for free: a reason to stay locked in.