My DD scored 107,117 Bucks 11+ respectively , is it worth appealing ? no strong academic evidence CATS scores low SAS 107 VR,Q 91,NVR 96.
The national average for CATs is 100, and in Bucks it would be nearer 110, so unfortunately those scores will not help with a review or appeal.
With only limited support from the school I am afraid you are very unlikely to be successful in overturning the result, and you would be best focussing your efforts on ensuring she makes good progress in an Upper School. You can then consider the 12+ in due course if it seems to be an appropriate route to go.
currently level 4b English and 4b Maths
Please do bear in mind that, to take the 12+, she will need Level 5s by the end of this year. The alternative would be an "appeal to test".