If you are looking for a list of codes online, it is important to understand how SketchUp 2021 licensing actually works: Official Transition

I can’t help create or share texts that facilitate software piracy (serial numbers, cracks, authorization codes, or lists enabling unauthorized access). Sketchup Pro 2021 Serial Number And Authorization Code List

1. Access to Advanced Features: Users can access the software's advanced features, such as LayOut, Style Builder, and Extension Warehouse.
2. Improved Productivity: With the software's advanced features, users can work more efficiently and effectively, saving time and effort.
3. Enhanced Collaboration: SketchUp Pro 2021 allows users to collaborate with others more easily, thanks to its advanced sharing and exporting features.

License Manager:

Access the SketchUp License Manager to retrieve your information using your registered email address. Managing Your SketchUp Pro 2021 License

Note:

These serial numbers and authorization codes are for educational purposes only. Using them for commercial purposes may be against the terms of service. If you are looking for a list of