Mine were toddlers only a few years ago. And the answer still goes back to time management. Two options. One, get all your shit done early, get the kids to bed, start your two hours. Two, designate two hours a day as your time, your wife gets her own two hours. You cover everything during their time, they cover everything during your time. My wife and I did both things. Now that the kids are in school, we use option 2.
Yeah unless you like work from home "getting two hours" where you're not called away for some crisis, or the kids want to spend time with you, or "your" two hours are actually just chores? That would be a miracle on a regular basis. Maybe when the kids are past middle school. But if you have 4 or more kids like you should, that will be a good 15 years when you're in the "young kid" phase.