Lost folders after upgrading to Catalina. Any chance to recover them?

Solution 1:

There is a 3rd party app called Stellar Data Recovery. There is a free trial period that can be used to recover your files. I used it about 8 months ago for some lost files and it recovered them for me. It was relatively easy to use as I did it myself and I'm not great at that type of thing. The software sells for $80 but it has a free download.