Information about UK visit in Stage 2

Information about your visit
Documents showing any plans you have made, such as:
tour details / flight details / letter of invitation / evidence of sponsor’s
immigration status in the UK

I am not sure if my visa will be granted or not then how can I submit the tour details and flight details?

Above document require in the Checklist for Stage 2 process after IHS and Visa payment.

What type of document I can easily show in stage two while I have plan to move to UK in Aug/Sep 2021 which is very far from now?

Thank you.

This is strictly related to visit visa. Ignore it. I am even surprised that you have found it under Global Talent stage 2 application.