Just got back from paternity leave and I'm already regretting it

Took 6 weeks off when my son was born (Jan 2024, he's now 5 months). First week back at work and I feel like I'm missing everything. He's starting to giggle and do new things and I'm stuck in meetings. My boss has been cool about it but I'm getting paid to sit at a desk while my kid grows up. Thinking about asking if I can do 4 days/week instead but I know that's not realistic financially. Anyone else struggle with this guilt?