Novak Djokovic's hope of playing in
Indian Wells and Miami was given a boost recently as there are more and more calls within the US to abandon the vaccination requirement for entering the country.
For now, Novak Djokovic can't enter the US because the country still employs a mandate that doesn't allow unvaccinated foreign nationals to enter the country. As such, Djokovic won't be able to enter the US to play at the Sunshine double as he wasn't permitted to enter last year. Those mandates will be lifted in the near future albeit not soon enough for him to enter the country.
A small boost came from calls within the US to lift them with Republican Thomas Massie arguing for it:
“The CDC’s unscientific mandate is separating too many people from their families and has been doing so for far too long. It needs to end."
The US Travel association supported the abolishment of that mandate as well noting that the US is the only country in the world to have that kind of thing in place. President Biden announced the extension of it after a surge in cases in China not long ago. It remains in place at least until may 11th, over a month past the Sunshine double.