Is it possible to add custom fields depending on absence reason? (not absence type)

Summary:

Requirement to create DFFs which appear contextually dependant on absence reasons

Content (please ensure you mask any confidential information):

I have made DFFs is the absence recording area which appear depending on absence type. I'd like them to displaying depending on absence reason instead of absence type. Is this possible?

Version (include the version you are using, if applicable):

25A

Code Snippet (add any code snippets that support your topic, if applicable):