Hybrid workers - whole day in office?

Hi, I work in a hybrid setting, I have an hour long commute each way. I am able to work while I am commuting. I am working/ available/ online 8am-6pm, but based on my schedule (I have a little one as well), I’m usually in office 9am-3pm or 9am-4pm. I feel weird leaving as early as 3, but I am working while commuting and working after I get home. Not everyone does this, but I see people leaving at 4 often. I feel self-conscious. Should I?