How to set content-types per folder within a Document Set

Question

I've searched through lots of similar questions, but surprisingly have not found one that matches up with what I am doing.

I am using Document Sets for a HR document library; each Doc Set automatically creates 5 folders.

Each folder will use different content types.

I will assign custom templates to be used for some of the content types, things like letter templates with the company logo.

Here is an example of a Document Set with the 5 folders.

I would like to make the 'Contracts' content type available only within the 2 - Contracts, T_Cs, Employee Benefits folder. At present it is only possible to do New Document>Contracts content type at the Document Library level (see screen shot below):

If I try to add New Document>Contracts with an Employee Document Set e.g. Joe Bloggs/2 - Contracts, T_Cs, Employee Benefits>New Document, I can not choose the Contracts content type:

I'd like to make Contracts available at the folder level and unavailable at the Document Library Level as only new Document Sets should be set up there.

Update - additional picture referenced in comments

Referenced Links:

Link, Link, Link, Link

Answer 1

Cameron Dwyer's excellent blog post had the answer. I had not been using folder content types, which are used in this Sharepoint configuration. This is why I had been unable to configure individual folder-level views (for my purposes each folder = an individual content type).

The solution involved creating multiple Folder Content Types and adding those CTs to the Document Library.

Here is what I was stuck on - I made a note of it for myself, but thought I'd share a screenshot of it for other peoples benefit in case they hit the same problem.

For further reading, Cameron also posted an answer to a question on SP SE.