As an infant, my daughter was content to be alone. That doesn’t mean I didn’t hold her, or just left her alone while I did whatever I wanted. I’d pick her up, she’d instantly become fussy until I eventually put her down. I could try to soothe her all I waned, but she couldn’t be soothed by my attempts. She was always hungry or would be completely gluttonous for anything she could drink. Yes, I know infants are hungry and thirsty, but not on the level in which I’m trying to describe. Once when she was 1, she fell during her crawl to walking stage. She slammed her head into the coffee table, and of course I’m freaking out, but she was all smiles. She said small words like mama, dada, baba as an infant… but no substantial words until she was 3, and then she started trying to structure sentences at 4. At 5, she was alright to go to school, as we realized early on she had autism and had slowly started showing and teaching her school aged stuff back when she was 3. We just got her diagnosis last year as she entered 1st grade.
Autism is different for every person. Symptoms aren’t often realized as early as infancy. So, we never truly noticed until she was 2 that something was atypical.
AND for this parents who’s kids don’t like having their hair washed, may I suggest swim goggles, and letting them do it themselves in a shower? Worked wonders for mine, though she still has issues getting all of the suds out of het hair lol