Alfie - an evening at Alfie's, the teenaged (female) baby sitter helps fix the leaky pipe.
Dogger - Bella is very kind, very good at sports and she and her mum wear funky 70's non-gendered clothes 
Apple Tree Farm - "this is Mrs Boot, the farmer" Mrs Boot is also the guard on the train. There is a Mr Boot, but I'm not sure what he does.
Topsy and Tim and pretty gender neutral, iirc.
Most of our books are about animals, but some of the animals are strong females
like Miffy (builds scooters, gardening with grandad, knitting with Grandma) or gruffalo's child (goes off exploring on her own, 'I'm not scared")
...is a gruffalo an animal? Anyway...
Then when she's older, my favourite, Pippi Longstocking!