The scale member of the CFG_SFIMU_IMU_MNTALG_YAW, CFG_SFIMU_IMU_MNTALG_PITCH, and CFG_SFIMU_IMU_MNTALG_ROLL structs (all of type ubx_cfg_item_t) in ublox_dgnss_node/include/ublox_dgnss_node/ubx/ubx_cfg_item.hpp is incorrect. They're all set to .001 (which is 1e-3), when they should be set to 1e2, according to the F9 HPS 1.30 Interface description manual (which seems to be the latest version).
This seems to be a very minor issue, since the scale member is not used anywhere else in the code, but just mentioning it for reference.