Are you doing any solids/purées at 4 months?

We had baby’s 4 month check up and he weighs 17 lbs 9 oz and his doctor said it’s okay to start slow intros to solid foods once a day, about a tbsp, stuff like avocado, banana, etc. I see most of the time on this app that people wait until 6 months and was just wondering if your doctor has or would give you the OK at 4 months will you introduce solids? She explained that it should be introduced between 4-6 months and they should be eating some foods BY 6 months, not AT 6 months. Not trying to fight or argue as I know this is controversial! Just curious since I’m sure a lot of moms in this group are approaching the 4 mo mark!