Squiggly pig - one other thought
It woudl be worth discussing with your DH how you think the chores will be divided if he's the one who takes parental leave and you are working 0.8 WTE ( I assume you mean the 4 days over 5 as you will be at home 2 afternoons per week ) .
IME it sees that when women go on maternity leave , they usually also take on most if not all of the household and child related chores
However, when men are SAHD, this doesn't seem to be the case . NAMALT this of course .
My friends DH took the adoption leave, for reasons smilar to your own. She was the higher earner. He got better conditions and pay from his employer . Also He hated his job and wanted to spend the leave writing a book .
When he was on leave he acted much like a babysitter -he fed and cared for the child when he was with her but did no chores, not even child related ones like shopping for food, washing clothes or tidying . My friend still did all the organising of parties, paydates, birthdays and Christmas , holidays , child related shopping ( clothes, toys, shoes ) , dentist ,doctors , social worker and hairdressers appointments etc , all the laundry , all the cleaning , all the food shopping , most of the DIY.
He literally just looked aftre their DD when she was at work. That's what he thought the deal was. Whenever she was not at work, she was 100% totally responsible for everything .
Of course that was them and I'm not saying your situation is the same . But
it might be worth having the conversation now, rather than it causing stress later on if one of you is not happy with the way things are working out .