If there is a physical lottery in our country, it will expire, and this depends on what kind of lottery game you are joining; they range from 3 days up to 1 month, and after that, you'll lose your winnings if you haven't claimed them as that is their agreement. But online, I am not really aware of it, but I am not sure why you will be leaving your winnings or, like, forgetting it. I mean, you can check it on a daily basis, like every minute, or they are also sending you emails to make sure that you won.
Lottery may have various rules, but for this reason, a lottery buyer must read the terms and conditions before purchasing the lottery. Lottery buyers will get all the information whether physical or online. A buyer to keep an eye on those things. In physical lotteries, winnings must be paid out with a specific time frame. Lottery winnings are more likely to expire if a lottery winner does not collect the winnings within the stipulated time. But there is no such problem in online. Because lottery buyers can easily monitor those things on a regular basis. If you win the online lottery, you will be notified by email.