A desktop publishing application from Microsoft that focuses on page layout and graphic design.
Microsoft announced in April, 2024 that Publisher will be retired in October, 2026 which gave everyone two and a half years to transition to new software.
Were I in your position, I would have spoken with my professional peers to discuss transitioning to new software or new workflows. There is less time for that now, but more than 5 months still remain.
In my long career I had to change software and workflows many times. This happened with Microsoft, Google and Linux applications. Software has an increasingly shorter shelf life as the pace of technological change has increased.
It's still possible to buy and use older versions of Publisher, but since these apps are not supported, you will be in the unenviable position of needing to provide your own technical support.