Cherished - not sure if you saw my second post but she already knows at least 13 kids in her class from kinder/childcare and has had playdates with a few of them when they were in kinder together. The issue isn't that she doesn't like them or they don't like her - it's just that she prefers the big kids.
DP reckons it's just that the bigger kids are more physical and I think he's probably right. DD1's the kid who's hanging upside down off the monkey bars, sliding down the school railings, circling down the fireman's pole etc. etc.
I also have a very active climber and she often played with the older kids when she was in her first year of school as most of her classmates didn't have the same interest or skill level with the climbing equipment and monkey bars
Personally I'd sit back and watch for a bit and continue to encourage play dates with similar aged friends as well as the older girl. Monitor it and if it seems her otheR friendships are suffering for it talk with the teachers
Dd's school is small so she knows all the students there which is nice but they have one day each week for reception to grade2 to pay on the big equipment and one day for the older classes so they do get their space and opportunity to play with their peers
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