It is very highly recommended that you uninstall those applications, and then reinstall them from the Creative Cloud desktop application, for many reasons.
One reason is that a lot of subtle things about the Mac system changed between El Capitan to Catalina, and many of those changes affected where important application support files should go and how they must be configured. A lot of it has to do with the major changes to tighten up Mac security and privacy. Some of the changes that affected Mac applications the most were in the most recent versions (10.13-10.15), which broke many more applications than usual. Heck, they even changed the name of the system, from Mac OS X to macOS.
Migration Assistant works very well, but the more versions of the Mac system you jump over, the more likely something is not going to work right. Mac OS X 10.11 El Capitan to macOS 10.15 Catalina is a jump of four major versions. (I have Catalina on one Mac and El Capitan on another really old Mac that can’t be upgraded any further, so I see the differences.)
Migration Assistant took everything as it was installed for El Capitan and tried to slot them as is into Catalina as best it can, but Migration Assistant doesn’t update non-Apple files for Catalina. The more complex the application and its support files, the more important it is to handle those on a case-by-case basis outside of Migration Assistant. It’s a good idea to uninstall major non-Apple applications before the migration and reinstall the latest versions on the new system, so that the installers have a chance to put everything in the right place in the right way.
Since you’ve already done the migration, try uninstalling and then reinstalling any applications that are not working right.
I only upgraded up one version, from macOS 10.14 Mojave to 10.15 Catalina, but everything I had read about the changes in Catalina made me think that I should install Catalina and everything on it from scratch, instead of migrating. So far that was worked well.
What ManiacJoe said about properly setting application security and privacy permissions is true, but those are totally expected things you have to do even if the entire migration worked perfectly, so that’s probably not the cause of your problems. Because the problems you are having are unexpected, you must resolve those first, but after that you will still need to deal with setting security and privacy permissions for many applications in Catalina, Adobe or not.
Another big reason is that Lightroom Classic 7.5 cannot be installed with the current Creative Cloud application because Adobe provides installers for the last two major versions only (Lightroom Classic 9 and 8). Also, the Adobe tech note Lightroom Classic and macOS Catalina (10.15) says that Lightroom Classic 9.x and Lightroom Classic 8.4.1 work with Catalina (version 7 not mentioned), and in bold it says “Adobe does not recommend that customers using old versions of Lightroom Classic upgrade to macOS Catalina.” So you’re going to have to uninstall Lightroom Classic 7.5 and install something newer anyway. You didn’t mention which version of Photoshop you are using, but if that version is not supported in Catalina you will have to move up to a newer version of it too.
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