Unlocked units XDA thread: https://forum.xda-developers.com/t/op7tpro-oos-hd01aa-hd01ba-unbrick-tool-to-restore-your-device-to-oxygenos.4002909/

Specific notes:
In global MSM tools, there is a target button.
Selecting "O2" as target should give you the global firmware while selecting "India" as target should give you the Indian one. See https://i.imgur.com/2ipNyIy.png

5G McLaren T-Mobile variant XDA thread: https://forum.xda-developers.com/t/op7tpro-tmo-5g-oos-10-0-40-hd61cb-unbrick-tool-to-restore-your-device-to-oxygenos.4043925/