When would you feel okay about being alone with your baby for a week or more?

My husband really wants to do a silent retreat this summer. I want to be okay with it, but one day being the sole caretaker of our baby (now 3 months old) is so exhausting already. I don’t know how I would possibly manage more than a week. Does it get easier as they get older?

At what point would you be okay with your partner doing a solo holiday like that?

(I realise I’m very privileged to have a partner that is so involved and shares 50% of the childcare with me - single mums and dads, I have literally no clue how you do it :/ )