Transfer code from IAR to CubeIDE?

Hi

I have been requested to redesign a current product using an ST32F405RG where the software was developed in the IAR IDE.

This is mainly a HW update that requires only a little bit of SW changes.

Unfortunately the IAR IDE is not available. Hence, I wonder if it is possible/feasible to use/transfer the code/files from the IAR environment and use them in ST's CubeIDE?

If possible, how cumbersome can I expect it to be?

Thanks!