Feeding 24/7 is also a poor plan for certain breeds - though as you are talking about laying hens, its unlikely you have a bunch of CornishX, which will (if given the chance) eat themselves to severe musculoskeletal problems or even death.
Feeding schedule will vary with your flock needs - most free choice or 24/7 if they have babes in the brooder and even into the grow out pen (unless deliberately restricting intake, as for the CornishX), but use a different feeding method for the main flock.
For instance, i let mine free range by opening the gate while the coffee is brewing, right around dawn typically. Then in the early evening as I put them away, I'll throw some food down and watch their consumption for a bit - it both encourages them to return to the pen on their own, and gives me an idea of how they are faring in their foraging. Occasionally, I offer too much, and they stop eating, go settle down on their roosts - only to be back finishing it in the AM (note this makes a very attractive nuisance for various insects, mice, etc - its not good practice on my part to overfeed - offered out of compulsion for honesty, so you are aware of the potential issues associated)
It will work, as long as they have access to water as soon as they wake up.
As for food, I feed fermented feed once per day, typically in the afternoon. That way they can forage and find their own food for a couple hours. Find the link to fermenting feed in my signature below.
Btw, welcome to the flock!
Take a few minutes (or hours) to familiarize yourself with the site. Pretty much everything you could ever want to know about chickens, and lots of other stuff, has been covered here. There’s a tremendous amount of excellent information, concisely presented, in the articles section.
Fair warning- you’ll find differing opinions but most folks are happy to discuss their stance.