Vim don't recognize python310.dll in Miniconda virtual environment

Question

If I use the following

set pythonthreehome=C:\\Users\\myname\\Miniconda3
set pythonthreedll=C:\\Users\\myname\\Miniconda3\\python39.dll

I have no problems, but if I set the following

set pythonthreehome=C:\\Users\\myname\\Miniconda3\\envs\\myenv
set pythonthreedll=C:\\Users\\myname\\Miniconda3\\envs\\myenv\\python310.dll

then python is not recognized any longer.

The path is correct and the python310.dll exists. Using Vim 9 (64 bit) on Win 10, Miniconda is also 64 bit.

Vim has been build with -DDYNAMIC_PYTHON3_DLL=\"python310.dll\" .