Farshad,
I don't know if this is a limitation of the Rad Studio 10.2 trial, but when I right click on the uSynEdit_R2021.bp in the project manager after running the build there is no menu option for Install. Perhaps I am not able to install the components in the Delphi trial environment? My menu choices are:
Compile
Build
Clean
From Here >
Run
Run Without Debugging
Build Sooner
Build Later
Show in Explorer
Add...
Add New >
Add Reference
Remove File...
Remove Project
Save
Save As
Rename
Add to Version Control
Activate
Sort By >
Dependencies
Modeling Support
Format Project Sources
Options
That's it. No Install. Maybe that's why I was confused as I'm usually pretty adept at following instructions.