Alternative final forms are not suggested in InDesign’s glyphs palette

Hi there,
I am working on a font with four variations for each letter. Often, I use the Glyphs palette to select the alternative versions. This works with regular n’s. However, when selecting a final form, I do not get the other three versions of the final letters offered in the palette, just the regular n’s and the first variation of initial n’s.

I wondered if anybody else encountered the issue and maybe found a solution or had a suggestion.

Could this be a naming issue?
The naming is n.fina.ss01, n.fina.ss02 etc.

Could this be an issue with InDesign?

Anyhow - Thank you for taking the time to look into this.
Best,
H

Does the substitution work in apps such as fontgauntlet.com?

If so, are you sure you’re using the latest exports? Are you using the Adobe Fonts folder? Testing your fonts in Adobe apps | Glyphs

In order to appear in the glyph palette, a glyph needs to appear in a one-to-one substitution, and the feature needs to be listed in aalt.

The glyph n.fina.ss02 is, for example, mentioned in the Stylistic Set 2 as sub n.fina by n.fina.ss02;
And feature ss02; is then listed in aalt
But the glyph (i.e. n.fina.ss02) is not listed in the InDesign glyphs palette as an alternative to n (may it be n or n.fina or n.fina.ss03 or n.init)

Did you consult the resources I mentioned?