Honest assessment: how do you actually be "present" after work?

Everyone says "be present with your kids" but I'm genuinely wrecked by 6pm. My brain is fried from problem-solving all day. I'm sitting on the couch while my kids play and I'm half-listening, checking my phone. I feel like a zombie. My wife gives me crap about it but she doesn't get it – she has a different job. I'm not saying I want to tune out completely but I think the expectation that I'm gonna have deep conversations and do crafts right after an intense workday is unrealistic. Does this get better? Or am I just someone who needs to accept they're not an evening-activity dad?