Is there any time frame for revision of future lot size and how does stock picking is done for future?

General
1

like bajaj finance has such a huge margin so it’s lot size must be revised.

second JP associate share price is around 11 rs and future lot size is 68000. how this share is allowed for future trading.

2

https://www.nseindia.com/products/content/derivatives/equities/selection_criteria.htm