i had creat a gift, but wonner says not available for his country

ask the winner, if he agrees to delete the giveaway, then create a ticket
If he doesn't agree, you have to take a "non received"

After the giveaway got deleted you can create it again, but set the proper region restrictions, you can find them here: https://www.steamgifts.com/discussion/6L3NB/humble-bundle-july-2023-humble-choice-44-the-outer-worlds-back-in-stock

since you have already been answered.

for games from bundles(other than mysteyr where you have to guess which subID it is) I highly recommend checking the bundle threads to see what games have region locks to save yourself from this in the future
for example

The winner has no problem if you reroll the GA, as he stated in the words: " I don't mind if you allocate this key for a new giveaway, to someone in a compatible regio ".
Open een support ticket and ask for a reroll in the form of 'request a new winner'.