As I no longer get vacation or sick leave, and get PTO instead, I can use it all up in one stretch if I want.
Previously, when the vacation time was actually vacation time, you had to get manager approval in advance for anything more than five consecutive business days. For us, it was a matter of filling in a form and getting it rubber-stamped, but I can see how that policy might be more selectively enforced for different classes of worker.
The common practice now is to limit the amount of PTO that accrues per pay period in the first place, and then cap the amount you can bank for the future. I have never had enough to take more than seven consecutive business days at once. And that has happened exactly once.
American employers (overgeneralizing) do not care about employee morale. They will use us up and throw us out if they can. The onus is entirely upon the employee to avoid their own burnout.
The letter-of-the-policy move here would be to take two weeks, work remotely or from a satellite office for one day, then take another two weeks. But I think this company may be treading on thin ice, legally. If the policy de facto discriminates against Indian employees, they may want to consult with an employment-law lawyer.