This is some concept you can work around without attach and debug around :

1. Using RevitAddinmanager : https://github.com/chuongmep/RevitAddInManager

Revit AddinManager update .NET assemblies without restart Revit for developer.

2. Using Proof of concept that it is possible to run and debug unit tests in Visual Studio with remote execution inside Revit.

• https://github.com/NeVeSpl/RevitTestLibrary

• https://github.com/ricaun-io/RevitTest

• https://github.com/specklesystems/xUnitRevit

3. Using hot reload concept : https://learn.microsoft.com/en-us/visualstudio/debugger/hot-reload?view=vs-2022

4 . Attach to a process is good just in case you are opening Revit and the process is test for sometime need, but it's not high recommend for this case