The problem is not so much access to tooling, but access to mainframes. I can learn COBOL in a day or two, and I would love to work on a "boring" COBOL job, but I have no experience with mainframes.
Is there anything particularly different about mainframes compared to working on a server besides it probably being a different operating system? I assume it has a command line and you ssh into it somehow (or something similar)? Or are they still running punch cards or something?
I know two people that spend some of their time writing COBOL for a major bank. They do find that part of the job pretty boring, it is basically just writing down SQL queries in a COBOL file and then trying to get passed their 50 year old development workflow (merge to master, then do testing in a testing environment, then get code review..).
The goal of SuperBOL (https://superbol.eu) is to allow companies to migrate from mainframes to Linux workstations, to get a "modern" experience of development and deployment.
Indeed, mainframes are hard to get access to, and require a training by themselves, I have worked on Linux and Windows for years, and development on a Mainframe has nothing in common :-)
I think the problem of COBOL is not only the lack of COBOL developers, it is the lack of expertise in COBOL environments, because they have become obsolete (both on mainframe and proprietary tooling for Linux/Windows). By providing a modern environment on Linux for COBOL, our goal is to solve the hardest part of the problem, as learning COBOL itself is not so hard for existing open-source developers...