To check if the customization function of the mini program is complete, you can follow the following steps:

与开发团队或进行沟通：与定制小程序的开发团队或保持及时沟通是非常重要的步。通过与开发团队或交流，你可以了解到项目的进展情况，他们是否已经完成了所需的功能。

Communicating with the development team or developers: Maintaining timely communication with the development team or developers of customized mini programs is a crucial step. By communicating with the development team or developers, you can understand the progress of the project and whether they have completed the required functions.

参与开发过程：如果可能的话，尽量参与到小程序的开发过程中。这样你可以第时间了解到开发进展、功能实现的具体情况，以及当中可能存在的问题。通过与开发人员的沟通和参与，你可以更好地掌握项目状态。

Participate in the development process: If possible, try to participate in the development process of small programs. This way, you can quickly understand the development progress, specific implementation of functions, and potential issues that may exist. By communicating and participating with developers, you can better grasp the project status.

测试功能：完成开发的功能需要经过测试来验证其是否设计要求。在此阶段，你可以仔细测试每个功能点，确认它们是否按照预期工作。如果发现问题或需求变更，及时与开发团队或进行沟通。

Testing function: The developed function needs to be tested to verify whether it meets the design requirements. At this stage, you can carefully test each function point to confirm whether they are working as expected. If problems or changes in requirements are found, communicate with the development team or developers in a timely manner.

验收功能：当所有功能都开发完成，进行终的验收工作，确保定制的小程序满足你的要求和期望。在验收过程中，你可以检查每个功能是否都按照预期工作，并与开发团队达成致。

Acceptance function: After all functions are developed, conduct the final acceptance work to ensure that the customized mini program meets your requirements and expectations. During the acceptance process, you can check whether each function is working as expected and reach an agreement with the development team.

使用反馈：在小程序正式上线发布，继续观察用户的反馈和使用情况。如果发现某些功能存在问题或需要改进，及时向开发团队反馈，并协商解决方案。

Usage feedback: After the mini program is officially launched and released, continue to observe user feedback and usage. If any issues or improvements are found with certain features, promptly provide feedback to the development team and negotiate solutions.

通过上述步骤，你可以多维度了解小程序定制的功能是否已经完成，并及时跟进项目进展。。

Through the above steps, you can have a comprehensive understanding of whether the customized functions of the mini program have been completed and follow up on project progress in a timely manner..