Yes, you can.
Note that, If you transfer the project with the source code to your customer, you also need to transfer your license key to your customer. No additional license is required for this transfer.
Simply contact us in order to transfer the license.
Understand that the license key is unique which requires to
Validate the purchase,
Get GitHub private repository access
Get premium support
Future updates and fixes
In the future, it may be required to install the template package.
Refer to the following articles for more details: