Don’t confuse laying hybrids in industrial factory farming with laying hybrids as backyard chickens.
Isa browns who die at about 2 yo as byc are an exception. The ones who are kept for industrial egg production had a real miserable life and are less healthy when they get into their first moult. Most hens go to a slaughter house before they become 2 yo. Rescues are a rare exception. But even rescues often live a few more years without problems.
Prepare for moulting with extra light too. You can postpone a moult/egg production break with extra light to get eggs in winter, but you cant stop her internal clock completely.
Maybe its best to add a heater when the temps drop

and the hens start to moult. I only know ventilation is in winter just as important as in summer. Its not a good idea to keep it warm inside by closing the vents because humidity builds up in the coop if the ventilation is insufficient.
I have no comparable experience at all with your current circumstances and I haven’t read much about it either.
Some people who keep laying hybrids for egg production, kill the hens when they stop laying. Sort of like the hens in factory farming. But I gather you want them to have a longer life.
There are a few articles about keeping chickens in winter you could look into.
Good luck.
https://www.backyardchickens.com/articles/caring-for-chickens-in-the-winter.77128/