I still don't completely understand the bridge, and lots of the names are not clear enough.
There are public methods like add_implicit_profiles and commit that even with the comments I don't feel like I understand when to call them and if it is needed to call them at all.
Aren't stream_bridge::is_explicit and stream_bridge::is_implicit opposites?

I kind of feel like the bridge should be dds_sensor_based_device_sensor inheriting from dds_device_sensor, and maybe even in the application level not realdds.

I don't have any more comments at the moment.

I still don't like the name dds_stream_sensor_bridge and the naming of some of it's methods but I don't have better names.