Baby carseat issues

My baby is about 9kg+ now and I'm currently using the Royal Kiddy with isofix and as we rotate to rear facing, her legs alr reached to the max of the car seat which resulting in bending of her knees at times. Does that means she's ready for forward facing now? She's turning 10 months old this month and height wise 50% percentile. So I wouldn't say she's tall but even with tilting of different angles, her legs will max out and touch the back seat. Or is this an issue with Royalkiddy car seat? Tia