When creating an NFT, on the second step, after uploading the file and clicking Next, you can activate the Add new tokens to collection function:'
Click Create NFT.
You will see that the function to add new tokens to the collection is activated:
Click Confirm and check the information:
Now that you have created an NFT, go to My NFT and select it:
Click on the additional menu. You have access to the Add token function:
Select quantity and click Confirm:
Check the data, review the fee (1) and click Confirm (2):
You have successfully added a new token to the collection:
In the My NFT section, you can also see the number of tokens in the collection: