Just came back from paternity leave and I feel like a stranger in my own house

Took 6 weeks off when my daughter was born in June. First week back at work and honestly? I miss her so much it hurts. But more than that, my wife has all these routines and rhythms with her that I'm completely outside of now. She's only 7 weeks old and I feel like I missed the memo on a thousand things. Went to change a diaper yesterday and somehow did it wrong even though I've changed like 50 diapers. Anyone else feel this after coming back? Does it get better or am I just the backup parent now?