Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/SiM3_NRND/SIM3L168_A/PBSTD_0/PBDRV#0x0
PBPUEN=DISABLED
Drive Strength
Drive Strength.
Port Bank Weak Pull-up Enable.
0 (DISABLED): Disable weak pull-ups for this port.
1 (ENABLED): Enable weak pull-ups for this port.
https://github.com/cmsis-svd/cmsis-svd-data