You can try this, It help me to install some region locked game from steam, sometimes only using VPN is not enough so the hard way is --->
1. In Windows search for your Region settings and change your 'Country or Region' to a country where you can download the game (ex: In France you can).
2. From here select 'additional date, time, & regional settings' on the right side of the screen.
3. Choose 'Change date, time, or number formats' and change to the 'Administrative' tab.
4. Select 'Change system locale...'
5. Set this to a
country where the game is not region locked (again I'm in France and I can DL it) as well. OK/Apply these changes and it will ask you to restart. Cancel this.
6. Connect your VPN (there plenty free VPN) to the
country you choose on Part 5
7. Go to this page and click the green install button on the top right of the screen!
You must be registered to see the links
Once the launcher is installed you can disconnect the vpn and revert the regional changes you've made.
If it work, I'm happy for you if not I'm out of idea for now.