Is my baby sleeping too much?

Not sure if this is considered a good problem, but my 5 week old baby is sleeping for >3h each stretch, even during the day. Should I wake her up for feeds and/or play time? She currently sleeps for 3-4h, wake up for milk, then falls back asleep after. Only time she is awake is if we head out for lunch - for such instances, she is usually awake during the entire duration of 2-3h, then is back to her 3-4h sleep times once we are home. Or is my lunch time considered her “play time”, so it’s ok to let her sleep according to her own schedule?