Country tag for Tibet is:
TIB
If you want play for Tibet HOI4 you could use tag command:
tag TIB
To annex Tibet in HOI4 you could use annex command:
annex TIB
To delete all Tibet units you could use deleteallunits command:
deleteallunits TIB
To add interests on Tibet you could use add_interest command:
add_interest TIB
To remove interests on Tibet you could use remove_interest command:
remove_interest TIB
To start occupation on Tibet you could use occupationpaint command:
occupationpaint TIB
More country tags for HOI4 or more cheats for Hearts of Iron IV