If you do not renew your domain, the domain is available for others to purchase and is no longer yours.

Once your domain is expired, you still have 45 days to renew. Some TLDs, such as .com .net, etc., enter the redemption status after the day the domain expires. If you want to restore your domain during the redemption period, you need to pay a Fee, and if you don't want to pay the amount, you will have to wait for the domain to be available for public registration.

After 75 days, you can not restore the domain name anymore, and you will have to make it available for public registration and delete your account.