The BloX Mosaic-X5 is based on the mosaicHAT which is equipped with a Septentrio Mosaic-X5. The BloX uses the ROS driver maintained by Septentrio.
Create a service to establish a ppp connection to the mosaicHat:

Connect to the modules UI via http://10.99.11.1/septentrio or to the ROS UI via http://10.99.11.1/
The BloX Mosaic-X5 publishes localization data as sensor_msgs/msg/NavSatFix.