Bluetooth Classic Incoming Data rate control

[nipntanna]

i am building bluetooth thermal printer based on esp32 bluetooth classic

i have set rx queue size of bluetoothserial to 15000(MAX AVAILABLE)

still thats getting full in 1 seconds and if data is more then 15k then some data might getting loss

other printers using bc417 bluetooth module have low ram and memory then esp32 still they can efficiently handle data of incoming

may be they have slow down incoming transmission rate i have tried so many but i didnt find the way to

please help me limiting incoming data rate and buffer overflow issues