You’re flying from India, it’s not a safe country (their definition not mine), you will do 7 nights sandbox (assume india is on permitted list for this), as of now only initial sandbox is Phuket or Samui. Is this going to change Nov 1 ? I don’t think so but maybe you’re right
You don’t need confirmed flights for visa normally but no idea about applying in India or what nationality you are. If you’re flying from India you will need mandatory hotel quarantine if not fully vaccinated and India is not one of the 46 designated “safe countries”