Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAME51J19A/USB/DEVICE/STATUS#0x0
LINESTATE=0, SPEED=FS
DEVICE Status
Speed Status
0 (FS): Full-speed mode
1 (LS): Low-speed mode
2 (HS): High-speed mode
USB Line State Status
0 (0): SE0/RESET
1 (1): FS-J or LS-K State
2 (2): FS-K or LS-J State
https://github.com/cmsis-svd/cmsis-svd-data