Gallium and germanium ban by China are not technically rare earth metals 中國禁止的鎵和鍺從技術上講並不屬於稀土金屬

https://www.rareelementresources.com/rare-earth-elements
https://pubchem.ncbi.nlm.nih.gov/periodic-table/

Gallium* arsenide and the gallium semiconductors are used for outer space electronics (such as used in satellites and some missiles). This is because Gallium semiconductors are much more resistant to radiation.

US battle doctrine is based on the full deployment of space assets in a networked panopticon of surveillance, detection, and control, and that in turn is based on having the electronics to make that possible.

The military that commands Airspace commands Land and Sea. But the military that commands Space commands Air. That has just been made more difficult for the US.

Gallium and Germanium are not technically rare earth metals. REM’s are usually metals that are so rare you rarely hear them named unless you are in the industry or commerce.