Are you using Unified or Classic ?
If you are using Classic, the create option will not be there as you need to create a copy from an existing environment.
If you are using Unified please review Note 1637199 - Using the planning applications KIT
• General activation of planning applications KIT
These 2 parameters need to be in table view RSPLS_HDB_ACT in SM30 and active:
BPC_ACT - active
HANA_ACT active
HTH