I29 approved on 06 April 2020 valid till 31st December 2020, No stamping, what option ? Extension?

Dear Community,

Hope you are doing good !!

need help to explore what option I have now.

from India I applied my H1B Cal exempt that i129 got approved in April 2020. but I got to know in October that petition validity is from April 2020 to 31st December 2020 only.

now due to travel ban I can’t stamp and fly to extend it.

What is the option I have now ?
can I do extension from here in India ? if yes then is it going to take same time or it will be faster ?

Please help me.

Thank you
Hiitesh