GitHub - hiloyt/the-sims-2-legacy-ikea: An easy way to restore The Sims 2: IKEA Home Stuf to The Sims 2 Legacy Collection
github.com
An easy way to restore The Sims 2: IKEA Home Stuf to The Sims 2 Legacy Collection - hiloyt/the-sims-2-legacy-ikea

If I recall correctly this pack was also missing from the Ultimate Collection version that was given away for free on Origin years ago.