Cannot get Darktable to recognize Lens

My page ^^

You might find using :memory: for your library useful in your situation. You can specify it when invoking darktable from the command line:
https://docs.darktable.org/usermanual/4.0/en/special-topics/program-invocation/darktable/
or by editing your darktablerc file:
Find the line database=library.db and change it to database=:memory:

I did try that. It would probably be good if it didn’t take me so long to develop some pictures. By going to temporary storage I can keep the libraries around for a little while (days - weeks) and only need to continue work on the same machine for that period of time to preserve the continuity.