My second DC was a girl and now she’s nearly two I’d be lying if I said I haven’t noticed the variety in colour and styles and designs girls have boys don’t. It’s for decorative purposes but I agree it’s a shame the boys choose from grey, black or white and the girls have every colour of the rainbow.
Those shorts are an alternative to a summer dress. It might not necessarily lead to bullying but unwanted questions, isolation and feeling different which aren’t things that you’d want to start school with 