Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/EFR32MG24A120F1536GM48/DCDC_NS/SYNCBUSY#0x0
Syncbusy Status Register
CTRL Sync Busy Status
EM01CTRL0 Sync Busy Status
EM01CTRL1 Sync Bust Status
EM23CTRL0 Sync Busy Status
PFMXCTRL Sync Busy Status
https://github.com/cmsis-svd/cmsis-svd-data