Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/WGM160/WGM160P022KGN2/USB/DOEP0TSIZ#0x0
Device OUT Endpoint 0 Transfer Size Register
Transfer Size
Packet Count
SETUP Packet Count
https://github.com/cmsis-svd/cmsis-svd-data