You can only use the Accept offer feature when you allow buyers to make offers for your NFT.
To accept an offer, please ensure that Offer status is Open
Step 1: On the Sell Order Detail page, select Offer tab
Step 2: Offer Listing will be displayed, please click on Accept at Actions column
Step 3: An Accept Offer pop-up will appear, click on Accept
Step 4: Next, you need to Authorize your Wallet. After your wallet is authorized successfully, please confirm on Metamask to pay Gas Fee to accept the offer
Step 5: Once the transaction is successful, you can view it on Explorer page and receive payment to your wallet which is associated with your store