To generate new tokens you must use the "mint" function using token owner
wallet. You can doing this by using the Contract/Write tab on your BscScan
token page.
Note: remember that your tokens has a number of decimals (usually 18), so
you must use the entire number with decimals.
I.e. if you need to
generate 500 additional tokens, call the mint function by inserting
500000000000000000000.