Focus on the skills you can use.

If you think this experience is worth writing and want to include it in your resume, you can of course write it, or you can keep it mysterious. Careful interviewers will notice the existence of this gap and will definitely ask you this question. You can sort out your thoughts and talk about the content related to this position to avoid ambiguity. It is best to ignore this period and list the work experience related to the application in chronological order.