Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Infineon/XMC4300/USB0_EP0/DOEPTSIZ0#0x0
Device OUT Endpoint Transfer Size Register
Transfer Size
Packet Count
SETUP Packet Count
1 (value1): 1 packet
2 (value2): 2 packets
3 (value3): 3 packets
https://github.com/cmsis-svd/cmsis-svd-data